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In theGermanic languages, astrong verb is a verb that marks its past tense by means ofchanges to the stem vowel. A minority of verbs in any Germanic language are strong; the majority areweak verbs, which form the past tense by means of adentalsuffix.

In modern English, strong verbs includesing (presentI sing,pastI sang,past participleI have sung) anddrive (presentI drive, pastI drove, past participleI have driven), as opposed to weak verbs such asopen (presentI open, pastI opened, past participleI have opened). Not all verbs with a change in the stem vowel are strong verbs, however: they may also be irregular weak verbs such asbring, brought, brought orkeep, kept, kept. The key distinction is that the system of strong verbs has its origin in the earliest sound system ofProto-Indo-European, whereas weak verbs use a dental ending (in English usually-ed or-t) that developed later with the branching off ofProto-Germanic.

The "strong" vs. "weak" terminology was coined by the German philologistJacob Grimm in the 1800s, and the terms "strong verb" and "weak verb" are direct translations of the original German termsstarkes Verb andschwaches Verb.

Strong verbs have their origin in the ancestralProto-Indo-European (PIE) language. In PIE, vowel alternations calledablaut were frequent and occurred in many types of word, not only in verbs. The basic vowel was *e (e-grade), but, depending on what syllable of a word the stress fell on in PIE, this could change to *o (o-grade), or disappear altogether (zero grade). Bothe ando could also be lengthened toē andō (lengthened grade). Thus ablaut turned shorte into the following sounds:

As the Germanic languages developed from PIE, they dramatically altered the Indo-European verbal system. PIE verbs could occur in three distinctaspects: theaorist, present and perfect aspect. The aorist originally denoted events without any attention to the specifics or ongoing nature of the event ("ate",perfective aspect). The present implied some attention to such details and was thus used for ongoing actions ("is eating",imperfective aspect). The perfect was astative verb, and referred not to the event itself, but to the state that resulted from the event ("has eaten" or "is/has been eaten"). In Germanic, the aorist eventually disappeared and merged with the present, while the perfect took on a past tense meaning and became a general past tense. The strong Germanic present thus descends from the PIE present, while the past descends from the PIE perfect.

In the course of these changes, the different root-vowels caused by PIE ablaut became markers of tense. Thus in Germanic, *bʰer- became*beraną in the infinitive (e-grade); *bar in the past singular (o-grade); *bērun in the past plural (ē-grade); and *buranaz in the past participle (zero-grade).

InProto-Germanic, the system of strong verbs was largely regular. Assound changes took place in the development of Germanic from PIE, the vowels of strong verbs became more varied, but usually in predictable ways, so in most cases all of theprincipal parts of a strong verb of a given class could be reliably predicted from the infinitive. Thus we can reconstruct Common Germanic as having seven coherent classes of strong verbs. This system continued largely intact in the first attested Germanic languages, notablyGothic,Old English,Old High German andOld Norse.

As well as developing the strong verb system, Germanic also went on to develop two other classes of verbs: the weak verbs and a third, much smaller, class known as thepreterite-present verbs, which are continued in the English auxiliary verbs, e.g.can/could, shall/should, may/might, must. Weak verbs originally derived from other types of word in PIE and originally occurred only in the present aspect. They did not have a perfect aspect, meaning that they came to lack a past tense form in Germanic once the perfect had become the past. Not having a past tense at all, they obviously also had no vowel alternations between present and past. To compensate for this, a new type of past tense was eventually created for these verbs by adding a-d- or-t- suffix to the stem. This is why only strong verbs have vowel alternations: their past tense forms descend from the original PIE perfect aspect, while the past tense forms of weak verbs were created later.

The development of weak verbs in Germanic meant that the strong verb system ceased to be productive; practically all new verbs were weak, and few new strong verbs were created. Over time, strong verbs tended to become weak across languages, so that the total number of strong verbs in Germanic languages has decreased over time.

The coherence of the strong verb system is still present in modernGerman,Dutch,Icelandic andFaroese. For example, in German and Dutch, strong verbs are consistently marked with a past participle in-en, while weak verbs have a past participle in-t in German and-t or-d in Dutch. In English, however, the original regular strong conjugations have largely disintegrated, with the result that in modern English grammar, a distinction between strong and weak verbs is less useful than a distinction between "regular" and "irregular" verbs. Thus, the verbto help, which used to be conjugatedhelp-holp-holpen, is nowhelp-helped-helped. The reverse phenomenon, whereby a weak verb becomes strong by analogy, is rare.

Some verbs, which might be termed "semi-strong", have formed a weak preterite but retained the strong participle, or rarely vice versa. This type of verb is most common in Dutch:

• lachen lachte (formerlyloech)gelachen ("to laugh")
• vragen vroeg (formerlyvraagde)gevraagd ("to ask")

An instance of this phenomenon in English isswell, swelled, swollen (thoughswelled is also found for the past participle, and the older strong formswole persists in some dialects as the preterite and past participle and has found new use in recent years.^[1]).

As an example of the conjugation of a strong verb, we may take the Old English class 2 verbbēodan, "to offer" (cf. English "bid").

This has the following forms:

While the inflections are more or less regular, the vowel changes in the stem are not predictable without an understanding of the Indo-Europeanablaut system, and students have to learn five "principal parts" by heart. For this verb they arebēodan,bīett,bēad,budon,geboden. These are:

1. The infinitive:bēodan. The same vowel is used through most of the present tense. In most verbs (other than classes 6 and 7), this represents the original ablaut e-grade.
2. The present tense 3rd singular:bīett. The same vowel is used in the 2nd singular. In many verbs, this has the same vowel as part 1. When it is distinct, as here, it is always derived from part 1 by Umlaut. For this reason, some textbooks do not treat it as a principal part.
3. The preterite (i.e. past indicative) 1st singular:bēad, which is identical to the 3rd singular. In this verb, part 3 comes from a PIE o-grade.
4. The preterite plural:budon. In West Germanic, the same vowel is used in the 2nd singular. In this verb, part 4 comes from a PIE zero-grade.
5. The past participle:geboden. This vowel is used only in the participle. In some verbs, part 5 is a discrete ablaut grade, but in this class 2 verb it is derived from part 4 by ana-mutation.

Germanic strong verbs are commonly divided into seven classes, based on the type of vowel alternation. This is in turn based mostly on the type of consonants that follow the vowel. The Anglo-Saxon scholarHenry Sweet gave names to the seven classes:

1. The "drive" conjugation
2. The "choose" conjugation
3. The "bind" conjugation
4. The "bear" conjugation
5. The "give" conjugation
6. The "shake" conjugation
7. The "fall" conjugation

However, they are normally referred to by numbers alone.

InProto-Germanic, the common ancestor of the Germanic languages, the strong verbs were still mostly regular. The classes continued largely intact inOld English and the other older historical Germanic languages:Gothic,Old High German andOld Norse. However, idiosyncrasies of the phonological changes led to a growing number of subgroups. Also, once the ablaut system ceased to be productive, there was a decline in the speakers' awareness of the regularity of the system. That led to anomalous forms and the six big classes lost their cohesion. This process has advanced furthest in English, but in some other modern Germanic languages (such as German), the seven classes are still fairly well preserved and recognisable.

The reverse process in which anomalies are eliminated and subgroups reunited by the force of analogy is called "levelling", and it can be seen at various points in the history of the verb classes.

In the later Middle Ages, German, Dutch and English eliminated a great part of the old distinction between the vowels of the singular and plural preterite forms. The new uniform preterite could be based on the vowel of the old preterite singular, on the old plural, or sometimes on the participle. In English, the distinction remains in the verb "to be":I was, we were. In Dutch, it remains in the verbs of classes 4 & 5 but only invowel length:ik brak (I broke – shorta),wij braken (we broke – longā). In German and Dutch it also remains in the present tense of thepreterite presents. InLimburgish there is a little more left. E.g. the preterite of to help is(weer) hólpe for the plural but either(ich) halp or(ich) hólp for the singular.

In the process of development of English, numerous sound changes and analogical developments have fragmented the classes to the extent that most of them no longer have any coherence: only classes 1, 3 and 4 still have significant subclasses that follow uniform patterns.

Before looking at the seven classes individually, the general developments that affected all of them will be noted. The following phonological changes that occurred between Proto-Indo-European and Proto-Germanic are relevant for the discussion of theablaut system.

• The development ofgrammatischer Wechsel as a result ofVerner's law (the voicing of fricatives after an unstressed vowel). This created variations in the consonant following theablaut vowel.
• When the zero grade appears beforel,r,m orn, the vowelu was inserted, effectively creating a new "u-grade".
• o →a (alsooy →ai,ow →au).
• e →i wheni,ī orj followed in the next syllable. This change is known asumlaut, and was extended to affect other vowels in most later languages.
• ey →ī as a result of the above.
• e →i beforem orn followed by another consonant. This had the effect of splitting class 3 into 3a and 3b.

In West Germanic, the 2nd person singular past indicative uses the vowel of Part 3. Its ending is also an-i of unclear origin, rather than the expected-t < PIE *-th₂e of North and East Germanic, which suggests that this state of affairs is an innovation.

The first 5 classes appear to continue the following PIE ablaut grades:

Except for the apparent ē-grade in part 3 of classes 4 and 5, these are in fact straightforward survivals of the PIE situation.

The standard pattern of PIE is represented in Germanic by classes 1, 2, and 3, with the present (part 1) in the e-grade, past indicative singular (part 2) in the o-grade, and remaining past (part 3) and past participle (part 4) in the zero grade. The differences between classes 1, 2, and 3 arise from semivowels coming after the root vowel, as shown in the table below.

As can be seen, the e-grade in part 1 and o-grade in part 2 are shared by all of these five classes. The difference between them is in parts 3 and 4:

• In classes 1 and 2, the semivowel following the vowel was converted in the zero grade into a full vowel.
• In class 3 and the past participle of class 4, there was no semivowel but there were PIE syllabic resonants which developed in Germanic tou plus resonant; thusu became the Germanic sign of these parts. There is some evidence that this may have been the original behaviour of the past nonsingular / nonindicative of class 4 as well: to wit,preterite-presents whose roots have the class 4 shape showu outside the present indicative singular, such as *man- ~ *mun- "to remember", *skal- ~ *skul- "to owe".
• In class 5, the zero grade of the past participle had probably been changed to e-grade already in PIE, because these verbs had combinations of consonants that werephonotactically illicit as a word-initial cluster, as they would be in the zero grade.
• The *ē in part 3 of classes 4 and 5 is not in fact a PIE lengthened grade but arose in Germanic. Ringe suggests that it was analogically generalised from the inherited part 3 of the verb *etaną "to eat" before it had lost its reduplicant syllable, PIE *h₁eh₁d- regularly becoming Germanic *ēt-.

Class 6 appears in Germanic with the vowelsa andō. PIE sources of thea vowel included*h₂e,*o, and a laryngeal between consonants;^[a]possibly in some cases thea may be an example of thea-grade of ablaut, though the existence of such a grade is controversial. It is not clear exactly how theō is to be derived from an earlier ablaut alternant in PIE, but believable sources include contraction of the reduplicant syllable in PIE *h₂-initial verbs, or o-grades of verbs with interconsonantal laryngeal. In any event, within Germanic the resultinga ~ō behaved as just another type of vowel alternation.

InProto-Germanic, this resulted in the following vowel patterns:

• Class 2b is of unknown origin, and does not seem to reflect any PIE ablaut pattern.^[2]
• In class 3, there are also a few cases where the vowel is followed, at least in Proto-Germanic, by two consonants, neither of which is a nasal or a liquid.^[3] Examples: *brestaną "to burst", *þreskaną "to thresh" *fehtaną "to fight". All but one have a nasal or a liquidin front of the vowel. This will have become syllabic and resulted regularly inu before the nasal or liquid, which was then metathesised on the analogy of the remaining principal parts. E.g. part 3 of *brestaną will have been *bʰr̥st- > *burst-, reformed to *brust-.
• Similarly, class 6 includes some cases where the vowel is followed by two obstruents, like *wahsijaną "to grow".
• In classes 5, 6 and 7, there is also a small subgroup called "j-presents". These form their present tense with an extra-j-, which causesumlaut in the present where possible. In West Germanic, it also causes theWest Germanic gemination.

The forms of class 7 were very different and did not neatly reflect the standard ablaut grades found in classes 1–6. Instead of (or in addition to) vowel alternations, this class displayedreduplication of the first consonants of the stem in the past tense.^[4]

It is generally believed that reduplication was once a feature of all Proto-Indo-European perfect-aspect forms. It was then lost in most verbs by Proto-Germanic times due tohaplology. However, verbs with vowels that did not fit in the existing pattern of alternation retained their reduplication. Class 7 is thus not really one class, but can be split into several subclasses based on the original structure of the root, much like the first five classes. The first three subclasses are parallel with classes 1–3 but withe replaced witha: Class 7a is parallel to class 1, class 7b to class 2, and class 7c to class 3.

The following is a general picture of the Proto-Germanic situation as reconstructed byJasanoff.^[5] Earlier reconstructions of class 7 were generally based mostly on Gothic evidence.

The situation sketched above did not survive intact into any of the Germanic languages. It was changed significantly, but rather differently in Gothic on the one hand, and in the Northwest Germanic languages on the other.

Reduplication was retained in Gothic,^[4] with the vowelai inserted. However, as in all other strong verbs, consonant alternations were almost eliminated in favour of the voiceless alternants. The present and past singular stem was extended to the plural, leaving the reduplication as the only change in the stem between the two tenses. The vowel alternation was retained in a few class 7d verbs, but eliminated otherwise by generalising the present tense stem throughout the paradigm. The verblētan "to allow" retained the past formlailōt with ablaut, whileslēpan "to sleep" had the past tense formsaislēp without it. The formsaizlēp, withVerner-law alternation, is occasionally found as well, but it was apparently a relic formation with no other examples of alternation elsewhere.

In the northwest Germanic languages, which include all modern surviving Germanic languages, class 7 was drastically remodelled. Reduplication was almost eliminated, except for a few relics, and new ablaut patterns were introduced. Many attempts have been made to explain this development.Jasanoff posits the following series of events within the history of Northwest Germanic:^[5]

1. Root-initial consonant clusters were transferred to the beginning of the reduplicating syllable, to preserve the same word onset across the paradigm. The clusters were simplified and reduced medially. (Compare Latinscindō ~scicidī andspondeō ~spopondī, which show the same development)

   *hlaupaną: *hehlaup, *hehlupun > *hlelaup, *hlelupun

   *stautaną: *stestaut, *stestutun > *stezaut, *stezutun

   *blōtaną: *beblōt, *beblutun > *blelōt, *blelutun

   *grōaną: *gegrō, *gegrōun > *grerō, *grerōun

   *swōganą: *sezwōg, *sezwōgun > *swewōg, *sweugun (Englishsough)

2. Root compression:
   1. Based on the pattern of verbs such as singular *lelōt, *rerōd ~ plural *leltun, *rerdun, as well as verbs like singular *swewōg ~ plural *sweugun, the root vowel or diphthong was deleted in the past plural stem. TheGermanic spirant law caused devoicing in certain consonants where applicable.

      *haitaną: *hegait, *hegitun > *hegait, *hehtun

      *bautaną: *bebaut, *bebutun > *bebaut, *beftun ("tobeat")

      *hlaupaną: *hlelaup, *hlelupun > *hlelaup, *hlelpun

      *stautaną: *stezaut, *stezutun > *stezaut, *stestun

      *blōtaną: *blelōt, *blelutun > *blelōt, *bleltun

   2. In class 7c verbs, this resulted in consonant clusters that were not permissible (e.g. **hegldun); these clusters were simplified by dropping the root-initial consonant(s).

      *haldaną: *hegald, *heguldun > *hegald, *heldun

      *fanhaną: *febanh, *febungun > *febanh, *fengun

3. The past plural stem of class 7c verbs no longer appeared to be reduplicated because of the above change, and was extended to the singular. This created what appeared to be a new form of ablaut, witha in the present ande in the past plural.

   *haldaną: *hegald, *heldun > *held, *heldun

   *fanhaną: *febanh, *fengun > *feng, *fengun

4. This new form of ablaut was then extended to other classes, by alternating *a with *e in classes 7a and 7b, and *ā with *ē in class 7d (after Proto-Germanic *ē had become *ā in Northwest Germanic). In class 7a, this resulted in the vowel *ei, which soon merged with *ē (from Germanic *ē²).

   *haitaną: *hegait, *hehtun > *heit, *heitun > *hēt, *hētun

   *hlaupaną: *hlelaup, *hlelpun > *hleup, *hleupun

   *lātaną: *lelōt, *leltun > *lēt, *lētun

5. It is at this point that North and West Germanic begin to diverge.
   • In West Germanic, class 7e took *eu as the past stem vowel, by analogy with existing verbs with initial *(s)w- such as *wōpijaną, *weup(un) and *swōganą, *swewg(un).

     *blōtaną: *blelōt(un) > *bleut(un)

     *hrōpaną: *hrerōp(un) > *hreup(un) ("to cry,roop")

     *grōaną: *grerō(un) > *greu, *gre(u)wun

   • In North Germanic, class 7e instead took *ē as the past stem vowel, probably by analogy with class 7c which also had a long stem vowel.

     *blōtaną: *blelōt(un) > *blēt(un)

Stages 4 and 5 were not quite complete by the time of the earliest written records. While most class 7 verbs had replaced reduplication with ablaut entirely, several vestigial remains of reduplication are found throughout the North and West Germanic languages. Various other changes occurred later in the individual languages. *e in class 7c was replaced by *ē (> ia) in Old High German and Old Dutch, but by *eu (> ēo) in Old English.

The following "Late Proto-Northwest-Germanic" can be reconstructed as descendants of the earlier Proto-Germanic forms given above. Note that ē became ā in northwest Germanic.

The Proto-Germanic language most likely used more than 500 strong roots. Although some roots are speculative, the language can be reconstructed with the following strong roots based on the work ofElmar Seebold (1970), Robert Mailhammer (2007) and Guus Kroonen (2013).Proto-Germanic had aorist-present roots, a remnant of theaorist aspect found inProto-Indo-European. These verbs used the former aorist as a present tense form. The aorist had a zero-grade vowel, like parts 3 and 4 of the perfect. So these verbs have an anomalous vowel in the present tense, they decline regularly otherwise.

• Class 1 with 110 roots:*bīdaną,*bītaną,*blīkaną,*dīaną,*dīganą,*dīkaną,*drībaną,*drītaną,*dwīnaną,*fīganą- *fīhaną,*fīsaną,*flīhaną,*frīsaną,*gīnaną,*glīaną,*glīdaną,*glīmaną,*glīnaną,*glītaną,*gnīdaną,*grīnaną,*grīpaną,*hlīdaną,*hnīgwaną- *hnīwaną- *hnīganą,*hnīpaną-*knīpaną,*hnītaną,*hrībaną,*hrīnaną,*hrītaną,*hwīnaną,*kībaną,*kīkaną,*kīnaną,*klībaną,*knīdaną,*krīaną,*krītaną,*kwīnaną,*kwīþaną,*lībaną,*līhwaną,*līþaną,*mīganą,*mīþaną,*nīþaną,*nīwaną,*pīpaną,*rīdaną,*rīfaną,*rīhaną,*rīkaną,*rīmaną,*rīpaną,*rīsaną,*rīstaną,*sīganą,*sīhwaną,*sīpaną,*sīþaną,*skīdaną,*skīnaną,*skītaną,*skrīhaną- *skrīaną,*skrībaną,*skrītaną,*skrīþaną,*slībaną,*slīdaną,*slīkaną,*slīpaną,*slītaną,*smītaną, *snīgwaną-*snīwaną,*snīkaną,*snīþaną,*spīwaną,*splītaną,*sprīþaną,*stīganą,*strībaną,*strīdaną,*strīkaną,*strīmaną,*swībaną,*swīganą,*swīkwaną,*swīnaną,*swīþaną,*tīhaną,*þīhaną,*þīnaną,*þrībaną,*þrīnaną,*þwīnaną,*þwītaną,*wīhaną,*wīkwaną,*wīpaną,*wīsaną,*wītaną,*wlītaną,*wrībaną,*wrīhaną,*wrīnaną,*wrītaną,*wrīþaną;

Aorist-present roots:*diganą,*stikaną,*wiganą;

• Class 2a with 72 roots:*beudaną,*beuganą^b,*bewwaną^b,*blewwaną,*breusaną,*breutaną,*breuþaną,*brewwaną,*dreuganą,*dreupaną^b,*dreusaną,*feukaną^b,*fleuganą,*fleuhaną,*fleutaną,*fneusaną,*freusaną,*freuþaną,*geubaną^b,*geupaną,*geusaną,*geutaną,*gleupaną^b,*greupaną^b,*greutaną,*heubaną,*hleutaną,*hneudaną,*hneupaną,*hneusaną,*hneutaną,*hnewwaną,*hreudaną,*hreupaną,*hreusaną,*hreutaną^b,*hrewwaną,*keusaną,*kewwaną,*kleubaną,*kreudaną^b,*kreukaną^b,*kreupaną^b,*kreustaną,*leudaną,*leuganą,*leukaną^b,*leusaną,*leustaną,*neutaną,*reudaną,*reufaną,*reukaną^b,*reutaną,*seukaną^b,*seuþaną,*skeubaną^b,*skeutaną,*sleupaną^b,*sleutaną^b,*smeuganą^b,*smeukaną^b,*snewwaną,*spreutaną^b,*steubaną^b,*steukan,*streukaną,*streupaną,*teuhaną,*þeutaną^b,*þleuhan,*þreutaną;
• Class 2b with 29 roots:*būganą^a,*dūbaną,*dūkaną,*drūpaną^a,*fūkaną^a,*gūbaną^a,*glūpaną^a,*grūpaną^a,*hūkaną,*hrūtaną^a,*krūdaną^a,*krūkaną^a,*krūpaną^a,*lūkaną^a,*lūtaną,*rūkaną^a,*sūganą,*sūkaną^a,*sūpaną*skūbaną,*slūkaną,*slūpaną^a,*slūtaną^a,*smūganą^a,*smūkaną^a,*sprūtaną^a,*stūbaną^a,*strūdaną,*þūtaną^a;
• Class 3a with 78 roots:*bindaną,*brimmaną,*brinnaną,*dimbaną,*dingwaną,*dintaną,*drinkaną,*finkaną,*finþaną,*flinganą,*gimbaną,*ginnaną (*biginnaną),*gintaną,*glimmaną,*grimmaną,*grindaną,*hinkaną,*hinþaną,*hlimmaną,*hrimpaną,*hrindaną,*hrinkwaną,*kimbaną,*klimbaną,*klimpaną,*klinganą,*klinkwaną,*klinnaną,*krimmaną,*krimpaną,*kringaną,*krintaną,*kwinkaną,*limpaną,*lingwaną,*linnaną,*miskaną,*ninþaną,*rinnaną,*singwaną,*sinkwaną,*sinnaną,*sinþaną,*skrimbaną- *skrimmaną,*skrimpaną,*skrindaną,*skrinkwaną,*slimpaną,*slindaną,*slingwaną,*slinkaną,*slintaną,*spinnaną,*springaną- *sprinkaną ,*sprintaną,*stinganą,*stinkwaną,*swimmaną,*swindaną,*swingwaną- *swinganą,*swinkaną,*tinganą,*tinhaną,*tinnaną,*tinþaną,*trimpaną,*trinnaną,*þindaną,*þinhaną,*þinsaną,*þrimmaną,*þrinhaną,*þrinhwaną,*þrintaną,*þwinganą,*windaną,*winnaną,*wringaną;
• Class 3b with 75 roots:*belganą,*bellaną,*berganą,*berkaną,*bregdaną,*brestaną,*delbaną,*derbaną,*dwerganą,*fehtaną,*felhaną,*fertaną,*flehtaną,*fregnaną,*geldaną,*gellaną,*gelpaną,*gerdaną,*gerraną,*gleppaną,*gnellaną,*gnestaną,*hellaną,*helpaną,*hneskwaną,*hrespaną,*hwekkaną,*hwelbaną,*hwerbaną,*kerbaną, **kersaną (*kerzaną),*kwellaną,*kwerraną,*leskaną,*melkaną,*meltaną,*serþaną,*skelbaną,*skeldaną,*skellaną,*skerbaną- *skerfaną,*skerpaną,*skersaną,*skertaną,*skrellaną,*smellaną,*smeltaną,*smertaną,*snerhaną,*snerkaną,*snerpaną,*snertaną,*sterbaną,*stregdaną,*swelganą,*swellaną,*sweltaną,*swerbaną,*swerkaną,*teldaną,*þehsaną,*þersaną,*þreskaną,*þwersaną,*weltaną,*welwaną,*werganą,*werkaną,*werpaną,*wersaną,*werþaną,*werzaną- *werraną,*wreskwaną;

Aorist-present roots:*murnaną,*spurnaną;

• Class 4 with 26 roots:*beraną,*brekaną,*bremaną,*dwelaną,*felaną,*helaną,*hlemaną,*klenaną,*kwelaną,*kweraną,*nemaną,*skeraną,*stelaną,*stenaną,*swelaną,*swemaną,*sweraną,*temaną,*teraną,*tremaną,*þweraną;

Aorist-present roots: knedaną –*knudaną,*kwemaną – *kumaną,*swefaną – *sufaną, *tredaną –*trudaną, *welaną –*wulaną.

• Class 5 with 50 roots:*dewaną,*drepaną,*esaną,*etaną,*fehaną,*fetaną,*frehnaną,*gebaną,*getaną,*hlefaną,*hreganą,*hreþaną,*hrewaną,*hwekaną,*jedaną,*jehaną,*jesaną,*kewaną,*kresaną,*kweþaną,*lekaną,*lesaną,*mekaną,*metaną,*nesaną,*neþaną,*plehaną,*rekaną,*rekwaną,*sehwaną,*skehaną,*skrekaną- skrekkaną,*skrepaną,*slekwaną,*sprekaną,*streþaną,*treganą,*trekaną- *trekkaną,*þrekaną,*þrewaną,*webaną,*wedaną,*weganą,*wesaną,*wrekaną;

J present roots:*bidjaną,*frigjaną,*ligjaną,*sitjaną,*þigjaną;

• Class 6 with 41 roots:*akaną,*alaną,*ananą,*bakaną- *bakkaną,*dabaną,*drabaną,*draganą,*fahaną,*faraną,*flahaną,*galaną,*gnaganą,*grabaną,*hlaþaną,*hnabaną,*kalaną,*lahaną,*lapaną,*malaną,*sakaną,*skabaną,*skakaną,*slahaną,*snakaną,*spananą,*standaną,*takaną,*þwahaną,*wadaną, *wahwaną (*gawahwaną),*wakaną;

J present roots:*fraþjaną,*habjaną- *hafjaną,*hlahjaną,*kwabjaną,*sabjaną- *safjaną,*skapjaną,*skaþjaną,*stapjaną,*swarjaną,*wahsijaną;

• Class 7

7a with 11 roots:*aihaną,*aikaną,*fraisaną,*haitaną,*laikaną,*maitaną,*skaiþaną- *skaidaną,*spaitaną,*swaipaną,*taisaną,*þlaihaną;

7b with 14 roots:*audaną,*aukaną,*ausaną,*bautaną,*brautaną,*dauganą,*dawjaną,*haufaną,*hawwaną,*hlaupaną,*klawjaną,*naupaną,*skraudaną,*stautaną;

7c with 23 roots:*arjaną,*bannaną,*blandaną,*falganą,*fallaną,*faltaną,*falþaną- *faldaną,*fanhaną,*ganganą,*haldaną,*hanhaną,*pranganą,*saltaną,*skaldaną,*spaldaną,*spannaną,*staldaną,*stanganą,*waldaną,*walkaną,*wallaną,*waltaną,*waskaną;

7d with 27 roots:*bēaną,*bēganą,*blēaną,*blēsaną,*brēaną,*brēdaną,*dēaną,*drēdaną,*fēaną,*gēaną,*grētaną,*hwēsaną,*hwētaną,,*knēaną,*krēaną,*lējaną,*lētaną,*mēaną,*nēaną,*rēdaną,*sēaną,*slēpaną,*stēaną,*swēþaną,*tēkaną,*þrēaną,*wēaną;

7e with 24 roots:*bōaną,*bōwwaną,*blōaną,*blōtaną,*bnōwwaną,*brōaną,*brōkaną,*flōaną,*flōkaną,*glōaną,*grōaną,*hlōaną,*hnōaną,*hrōpaną,*hwōpaną,*hwōsaną,*knōdaną,*rōaną,*snōwaną,*spōaną,*swōganą,*þrōwaną,*wōpijaną,*wrōtaną;

Being the oldest Germanic language with any significant literature, it is not surprising that Gothic preserves the strong verbs best. However, some changes still occurred:

• e >i, eliminating the distinction between the two vowels, except in the reduplicated syllable wheree (spelledai) was retained in all cases.
• i >e (spelledai) andu >o (spelledau) when followed byr,h orƕ.
• Consonant alternations are almost eliminated by generalising the voiceless alternant across all forms.

Also, longī was spelledei in Gothic.

• Note: The soundskw andhw are transcribed in Gothic asq andƕ respectively.

Changes that occurred in the West Germanic languages:

• ē > ā
• a-mutation:u >o whena follows in the next syllable. This affected the past participles of classes 2–4. However, an interveningm orn + consonant blocked this, so the past participle of class 3a keptu.
• Extension of umlaut to back vowels, causing it to apply also to verbs of class 6.
• The perfective prefixga- came to be used (but neither exclusively nor invariably) as a marker of the participle. In English this prefix disappeared again in the Middle Ages.

The following changes occurred from West Germanic toOld English:

• ai >ā
• eu >ēo
• au >ēa
• a >æ except when a back vowel followed in the next syllable
• ā >ǣ
• Breaking before certain consonants:æ >ea ande >eo
• West Saxon Palatalisation:i > ie afterg

The following are the paradigms for Old English:

With j-presents (and other anomalies):

• hebban hōf hōfon hafen ("to raise, heave")
• scieppan scōp scōpon scapen ("to create, shape")
• swerian swōr swōron sworen ("to swear")

The verb "to stand" follows class 6. The anomalous-n- in the present is a relic of the PIEnasal infix:^[6]

• standan stōd stōdon standen

Some relics of class 7 reduplication remain in Old English, mostly in texts from Anglia (infinitive and past singular shown):

• bēatan beoft ("to beat")
• hātan hēht ("to call")
• lācan leolc ("to move about, leap")
• lǣtan leort ("to let")
• on-drǣdan on-dreord ("to dread")
• rēdan reord ("to advise")
• spātan speoft ("to spit")

Changes that occurred from Old English toModern English:

• ā > ō
• Great Vowel Shift
• The old second-person singular ("thou") form acquires the ending "-st" in the past, but the second-person singular falls out of common use and is replaced with the second-person plural.
• Elimination of almost all verb inflection in strong verbs, except for the third-person singular present ending-s (and the second-person ending "-(e)st", when used).
• Either the past singular form or the past plural form is generalised to the other number. As a result, only one form exists for all past tense forms and parts 2 and 3 are no longer distinguished.
• Combined with the above, all consonant alternations are eliminated by generalising the consonant of the present. Onlybe preserves the alternation:was versuswere.

In Modern English, generally speaking, the verb classes have disintegrated and are not easily recognisable.
For the principal parts of all English strong verbs see:Wiktionary appendix: Irregular English verbs.

The following modern English verbs resemble the original paradigm:

Class 1

Class 1 is still recognisable, as in most other Germanic languages. The modern past is taken from either the old past singular (ride rode ridden) or the old past plural (bite bit bitten). In the case ofshine shone shone, the past participle has also assimilated to the past singular.

Class 1 roots in modern English (excluding derived verbs such asabide andoverride) arebide,bite,chide,drive,hide,ride,rise,rive,shine,shit/shite,shrive,slide,smite,stride,strike,strive,thrive,write.Bide, chide, rive, shine, shrive, strive, thrive can also be weak.However, although most of these verbs have uniformity in their infinitive vowel, they no longer form a coherent class in further inflected forms – for example,bite (bit, bitten),ride (rode, ridden),shine (shone, shone), andstrike (struck, struck/stricken, withstruck andstricken used in different meanings) all show different patterns from one another – butbide, drive, ride, rise, smite, stride, strive, write do form a (more or less) coherent subclass. Most of these verbs are descended from Old English class 1 verbs. However:

• strive is a French loan-word which is class 1 by analogy todrive. (By coincidence it is ultimately descended from anOld Frankish class 1 verb.)
• thrive is a class 1 verb formed by analogy todrive, its Old English ancestor being weak and descended from Old Norseþrífa (itself a class 1 strong verb, meaning "to grasp").
• hide is a class 1 verb whose Old English ancestor,hȳdan, was weak.

In American English, the past tense of the verbdive is usuallydove, as though it is in Class 1, but the past participle is stilldived.

Class 2

Class 2 does not form a coherent class, as each verb has developed different irregularities. It includeschoose,cleave,fly,freeze andshoot (whose usual passive participle isshot rather thanshotten). The verbbid (in the sense of "to offer") was in Class 2, but now the past and past participle arebid. The obsolete verbforlese is now used only as the passive participleforlorn.

Class 3

Class 3 in English is still fairly large and regular. The past is formed either from the old past singular or from the past plural. Many of the verbs have two past forms, one of which may be dialectal or archaic (begin, drink, ring, shrink, sing, slink, spin, spring, stink, swing, swim andwring). The class 3a verbs in modern English are:

• normal past ina:begin,drink,ring,run,sing,swim,thring
• normal past inu orou:bind,cling,find,fling,grind,sling,slink,spin,sting,string,swing,win,wind
• past can have eithera oru:shrink,sink,stink,spring,wring (in colloquial language,bring can be analogically brought into this subclass)

Englishfling does not go back to Old English, and may be a loan-word from Norse. It seems to have adopted class 3 forms by analogy withcling etc. Similarly,ring andstring were historically weak. The verbding (in the meaning of to hit) was in this class as well, but is now usually treated as a weak verb.

Class 3b has shrunk to only four members:

• melt (the past tense is weak, but retains the strong participle ‘molten’ )
• swell (but the past tense is now oftenswelled instead ofswole, and sometimes the passive participle as well)
• fight
• burst, its past tense and participle have both become the same as the present tense. This is also the case for its variantbust

Class 4

In Modern English, regular class 4 verbs have all kept the–n in the participle, though eliminating the mediale afterr, this class exhibits near homogeneity of vowel pattern:

• break broke broken

but several verbs have archaic preterites that preserve the "a" of Middle English (bare, brake, gat, sware, tare, andspake orScotsspak). Class 4 verbs in English (not including derivatives such asbeget) arebear,break,get,shear,speak,steal,swear,tear,tread,wake,weave; and without the-n and of irregular vowel progression:come.Get, speak, tread andweave (weave, and occasionallytread, can also be weak) were originally of class 5, whereasswear was originally class 6.Wake was also originally class 6, and in fact retains the "a" of the present tense – the preteritewoke (Middle Englishwook) only conforms to the modern class 4 preterite, not to the historic class 4 preterite in "a".The verbcome is anomalous in all the West Germanic languages because it originally began withqu-, and the subsequent loss of thew sound coloured the vowel of the present stem. modern English "come came come", compared to Old Englishcuman cymþ – cōm cōmon – cumen and Middle Englishcomen – cam or com – comen.

Class 5

In Modern English this group has lost all group cohesion.

• eat ate eaten
• give gave given
• lie lay lain
• see saw seen
• sit sat sat (archaicsitten)

Class 5 verbs in Modern English:bid (in the sense of "to command" or "to invite"),eat,forbid,give,lie (= lie down),see,sit. The verbquethe is only used poetically now.Get, speak, tread, andweave, which come from Class 5 verbs, are now Class 4.The verbforbid comes from a Class 2 verb in Old English, as didbid in the sense of "to offer, proclaim", butforbid is conflated with the other verbbid ("to command"). The preterite can beforbad orforbade, or evenforbid. The preteriteate is pronounced "et" in some British dialects; historically the formeat, homophonous with the present stem was also found for the preterite.Although the verbto be is suppletive and highly irregular, its past follows the pattern of a class 5 strong verb, withgrammatischer Wechsel (the alternation of "s" and "r" in "was" versus "were"), and has uniquely retained the singular/plural distinction of both ablaut grade and consonant in the modern languages. Old English:wæs/wǣron, English:was/were. For full paradigms and historical explanations seeIndo-European copula.

Class 6

Class 6 has disintegrated as well. The verbsshake,take andforsake come closest to the original vowel sequence. The consonant anomaly instand is still visible, and is extended to the participle.

• shake shook shaken
• stand stood stood

Class 6 verbs in modern English:drag,draw,forsake,lade,shake,shape,shave,slay,stand,take. The verbheave is in this class when used in a nautical context. Like most other classes in Modern English, this class has lost cohesion and now forms principal parts according to many different patterns. Two preterites (drew andslew) are now spelled with "ew", which is similar in sound to the "oo" of the others that still use a strong form.Swear is now class 4. The adjectivegraven was originally a past participle of the now obsolete verbgrave.Lade, shape, shave,wax are now weak outside of their optionally strong past participle forms (laden, shapen,shaven, andwaxen respectively).Fare has archaic past tensefore and rare past participlefaren, but is normally weak now.

Class 7

InModern English, this class has lost its homogeneity:

• fall fell fallen
• hang hung hung (In the transitive sense of hanging someone by the neck,hang usually has regular weak conjugationhanged)
• hold held held (the original past participle is preserved in the adjectivebeholden)
• throw threw thrown

The following modern English verbs descend from class 7 verbs, and still retain strong-verb endings:beat,blow,fall,hew,grow,hang,hold,know,throw. (Hew can be a preterite or present, although the usual preterite, and sometimes the participle too, ishewed.) The verblet can be considered Class 7, though the past participle now lacks the ending-en. The verbsmow andsow sometimes retain the strong-verb participlesmown andsown but the preterites are now usuallymowed andsowed. (The verbsew was always weak, even though one can saysewn for the past participle.) The verbshow, originally a weak verb, has acquired a strong past participleshown, and in some dialects even a class 7 strong past tenseshew (This "shew" is not to be confused with present "shew", which is an older spelling of, and pronounced the same as, "show"). Archaic English still retained the reduplicated formhight ("called", originally a past tense, usually with a passive meaning, but later also used as a passive participle). The verbcrow was also in class 7, as in theKing James Version "while he yet spake, the cock crew".

Old Dutch is attested only fragmentarily, so it is not easy to give forms for all classes. Hence, Middle Dutch is shown here in that role instead. The situation of Old Dutch generally resembled that of Old Saxon and Old High German in any case.

Changes from West Germanic to Old Dutch:

• ai >ē (but sometimesei is preserved)
• au >ō
• eu >iu
• ē >ie
• ō >uo (later becomes/uə/, spelled <oe> in Middle Dutch)

From Old Dutch toMiddle Dutch:

• u >o
• ū >ȳ (spelled <uu>)
• iu >ȳ (northern dialects)
• iu >io >ie (southern dialects)
• Lengthening of vowels in open syllables:e >ē,o >ō,a >ā, although it continues to be written with a single vowel.i is lengthened toē, and shorty (from umlaut ofu) toeu/øː/.
• Unlike most other languages, umlaut does not affect long vowels or diphthongs except in the eastern dialects.
• Because of the combined effect of the two above points, umlaut is eliminated as a factor in verb conjugation.

From Middle Dutch toModern Dutch:

• Diphthongisation of long high vowels:/iː/ >/ɛi/,/yː/ >/œy/ (spelled <ij> and <ui>)
• Monophthongisation of opening diphthongs:/iə/ >/i/,/uə/ >/u/ (still spelled <ie> and <oe>)

Class 1

This class is well preserved and has the most strong verbs. Not only has it preserved many strong verbs inherited from the proto language, it was also able to expand by introducing the strong inflection to a large number of weak verbs by analogy. Sound changes caused the historical ‘ai’ and ‘i’ in open syllables, to merge as a long ‘e’ essentially merging parts 2,3,4.

Regular class 1 pattern (ɛi-e:-e:-e:):

• Inherited strong roots:bezwijken,bijten,blijken,blijven,drijven,glijden,grijpen,kijken,kijven,knijpen,krijgen,krijsen (can also be a weak verb),krijten ("to cry"),lijden,mijden,nijgen,nijpen,rijden,rijgen,rijten,rijven,rijzen,schijnen,schijten,schrijden,schrijven,slijpen,slijten,smijten,snijden,splijten,stijgen,strijden,strijken,tijgen,verdwijnen,wijken,wijten,wrijven,zijgen.
• Historically weak:belijden (influenced bylijden),hijsen,kwijten,lijken,prijzen,spijten,stijven,vijzen (Flemish),vrijen (also weak),wijzen,zwijgen.
• Two verbs with 'ei' have also joined this class by analogy, as 'ij' and 'ei' are pronounced the same:uitscheiden,zeiken.
• Non-standard, archaic or dialectal strong verbs:beklijven (strong verb forms are archaic),benijden (strong forms are common but non-standard),breien (strong forms are common but non-standard),drijten (a dialectal strong verb),hijgen (strong forms are common but non-standard),mijgen /miegen (a dialectal strong verb),pijpen (archaic strong verb, in the sense of playing a windinstrument),grijnen (an archaic strong verb),wrijten (archaic/dialectal strong verb),zijpen (dialectal strong verb),gedijen (the past tensegedee(g) is dialectal, the strong past participlegedegen has the meaningthorough whereas the weak past participlegedijd meansthriven, which corresponds to the regular meaning of the verb).

Class 2

A notable development in Dutch is the growth of class 2b at the expense of class 2a. Like class 1, sound changes caused the historical ‘au’ and ‘u’ in open syllables, to merge as a long ‘o’ merging parts 2,3,4.

Regular class 2a roots (i-o:-o:-o:):

• Inherited strong roots:bedriegen,bieden,genieten,gieten,kiezen,klieven,liegen,rieken,schieten,vliegen,zieden ("to seethe", weak in the sense "to be agitated").

• Restricted to literary or poetic use:verdrieten,vlieden,vlieten.

Regular class 2b roots (œy-o:-o:-o:):

• Inherited strong roots:buigen,duiken,druipen,kruipen,ontluiken,ruiken,schuiven,sluipen,sluiten,snuiven,spruiten,stuiven,zuigen,zuipen.
• Historically weak:fluiten,kluiven,pluizen,schuilen,snuiten,spuiten.
• Non-standard, archaic or dialectal strong verbs:fuiven (strong forms are used in colloquial Flemish),gluipen (a weak verb, strong forms are archaic),kruien (weak verb, strong forms are archaic),ontpluiken (an archaic strong verb),ruilen (strong forms are used in southern dialects),sluiken (an archaic strong verb),stuipen (an archaic strong verb),wuiven (strong forms are common but non-standard).

Anomalous class 2 roots:

• The verbsverliezen andvriezen preserved thegrammatischer Wechsel:verliezen-verloor-verloren, vriezen-vroor-gevroren. Although the rootkiezen has lost the alternation, the derived verb(uit)verkiezen still displays it in poetic or archaic contexts:verkiezen-verkoor-verkoren.
• The verbtijgen has a class 2 past tense and participle when it means 'to pull'.
• The verbspugen can also be declined with a class 2 past tense and participle.

Class 3

Class 3a and 3b have generalised part 3 to part 2, eliminating the-a- from this class. Some 3b verbs have a past in-ie- like class 7:helpen – hielp – geholpen. This can be considered a new "class 3 + 7".

Regular class 3a roots (ɪ-ɔ-ɔ-ɔ):

• Inherited strong roots:binden,blinken,dringen,drinken,dwingen, -ginnen (beginnen –ontginnen),glimmen,klimmen,klinken,krimpen,schrinken (archaic),slinken,spinnen,springen,stinken,verslinden,verzwinden (literary/poetic),vinden,winden,winnen,wringen,zingen,zinken,zinnen.
• Historically weak:dingen,schrikken.

Regular class 3b roots (ɛ-ɔ-ɔ-ɔ):

• Inherited strong roots:bergen,delven,gelden,kerven,melken,schelden,smelten,vechten,vlechten,zwelgen,zwellen,zwelten (archaic).
• Three verbs of another class have joined with 3b:treffen,trekken (both class 5),zwemmen (class 3a).
• Historically weak:schenden,schenken,zenden; These verbs became strong by reinterpreting theRückumlaut that was present in some Old and Middle Dutch weak verbs as a strong vowel alternation.

Class 3 + 7 roots (ɛ-i-i-ɔ):

• Inherited strong verbs:-derven (bederven –verderven),helpen,sterven,werpen,werven,zwerven.

Anomalous class 3 roots:

• The verbworden (to become) also belonged to class 3b, but the past and present vowels appear to have been swapped:worden werd geworden.
• Semi-strong with a weak past tense and a strong participle:barsten, the verb changed the older vowels 'e' and 'o' into 'a':barsten – barstte – gebarsten

Class 4

Class 4 and 5 verbs still show the distinction in vowel between the past singular (part 2) and plural (part 3), although this is not obvious due to the rules ofDutch orthography:ik nam ("I took") has the pluralwij namen (not*nammen), that is, the 'short' vowel[ɑ] of the singular is replaced by the 'long'[aː] in the plural. (Note the relationship of consonant doubling to vowel length, which is explained atDutch orthography). The pattern is therefore:breken brak (braken) gebroken ("to break")

Regular class 4 roots (eː-ɑ-a:-oː):bevelen,breken,nemen,spreken,steken,stelen.

Class 4 roots with 'o(o)' in the preterite (eː-o:-o:-oː):scheren,wegen andzweren ("to hurt, to sore").

Anomalous roots:

• The present tense vowel of the verbkomen was influenced by a precedingw, which was subsequently lost. The etymologicalw is retained in the past, unlike English or German:komen – kwam – kwamen – gekomen.
• Semi-strong with a weak past tense and a strong participle:verhelen (helen is a weak verb however),wreken.

Class 5

Regular class 5 roots (eː-ɑ-a:-eː):eten,genezen,geven,lezen,meten,treden,vergeten,vreten

Class 5 j-present roots (ɪ--ɑ-a:-eː):bidden,liggen,zitten. These have a short 'i' in part 1 because of the gemination of the consonants, they retain the long 'e' vowel in part 4.

Anomalous roots:

• The rootzien ("to see") has experienced a loss of the original/h/, with a resulting assimilation of the stem vowel to the vowel of the inflection, and showsGrammatischer Wechsel between this original/h/ and a/g/ in the past:zien – zag – zagen – gezien.
• The preterite ofwezen /zijn ("to be") still shows both (quantitative) ablaut andgrammatischer Wechsel between the singular and plural:was/waren.
• Semi-strong with a weak past tense and a strong participle:weven.

Class 6

Class 6 has become very small, many of its verbs have gone weak or have become semi-strong.

Regular class 6 roots (a-u-u-a):dragen,graven,varen.

Anomalous roots:

• The verbslaan (to hit) like the verbzien has experienced a loss of the original/h/, with a resulting assimilation of the stem vowel to the vowel of the inflection, and showsGrammatischer Wechsel between this original/h/ and a/g/ in the past:slaan – sloeg – sloegen – geslagen.
• The suppleted past tense of the verbstaan ("to stand") also belonged to this class, it now declines with a short 'o':staan – stond – stonden – gestaan.
• The three inherited j-presents,heffen,scheppen, and,zweren ("to swear an oath") historically decline with 'e'-'oe'-'oe'-'a(a)'. In the modern language they decline irregularly, two have taken 'ie' in the past tense, all three have taken separate vowels in the participle:scheppen – schiep – geschapen ("to create"),heffen – hief – geheven ("to lift, raise"),zweren – zwoer – gezworen ("to swear an oath"),.
• Semi-strong roots with a strong past tense and a weak participle:jagen,klagen (Flemish, colloquially),vragen,waaien.
• Semi-strong roots with a weak past tense and a strong participle:lachen,laden,malen,varen ("to fare" The sense "to travel by boat" has a class 6 pastvoer)

Class 7

Class 7 has shrunk in the modern language, like class 6 many of its verbs have become semi-strong. This class has an -ie- in the past tense, the past participle has the same vowel as the present tense. (The verbs with * are nowadays mostly semi-strong)

• Class 7a has disappeared. The verbsheten ("to call") andscheiden ("to separate") have become semi-strong.
• Class 7b:lopen,stoten*.
• Class 7c:gaan,houden,houwen,vallen,hangen,vangen,wassen* (The meaning to "to grow" is always strong but is archaic, the meaning "to wash" is mostly semi-strong).

• One verb displaysL-vocalization:houden – hield – gehouden ("to hold")
• As in German, two anomalous class 7c verbs have formed new present stems, and shortened the vowel in the past tense:vangen – ving – gevangen ("to catch") andhangen – hing – gehangen ("to hang"). The suppleted past tense of the verbgaan ("to go") also belongs to this class and is declined:gaan – ging – gegaan.

• Class 7d:blazen,slapen,laten,raden*.
• Class 7e:roepen.
• Semi-strong roots with a weak past tense and a strong participle:bakken,bannen,braden,brouwen,heten,raden,scheiden (uitscheiden is a class 1 verb however),spannen,spouwen, (in the meaning 'to split'),stoten,vouwen (the past had -ield-, likehouden),wassen,zouten (the past had -ielt-, likehouden).

Other

A special case ishoeven, which is a weak verb that can decline with a strong participle in some circumstances, even though the verb was never strong to begin with.

The distinction between simple past, present and past perfect has been lost inAfrikaans, as the original past tense has fallen out of use almost entirely, being replaced with the old present perfect tense using (usually) a strong past participle. For example, the ancestralDutchhij zong has becomehy het gesing ("he sang/has sung/had sung"). Modal verbs tend to retain their strong past tense, and a handful of other verbs do so too. Verbs almost never retain both a strong past tense and a strong past participle, due to the loss of the grammatical distinction. The exception iswees ("to be"), which does retain bothwas andgewees.Nonetheless, there are many verbs for which the new past tense is formed with a strong past participle, such asgeboë frombuig ("bend") orgedrewe fromdryf ("drive" to set into motion).

The notion exists that strong past participles always have a figurative meaning, and weak and strong past participles sometimes coexist within the language.Sometimes, this seems to be the case. For instance, compare strong and figurativebedorwe jeug ("spoiled youth") to weak and literalbederfde yoghurt ("spoiled yoghurt"), or strong and figurativegebroke hart ("broken heart") to weak and literalgebreekte vaas ("broken vase"). Nonetheless, this notion is not 100% accurate. Sometimes the strong past participle just happens to be more common. For instance, the strong participles are used inbevrore groente ("frozen vegetables") andaangenome kinders ("adopted children").^[7]

From West Germanic toOld High German:

• High German consonant shift
• ē >ia
• ai >ei, thenei > ē beforer, h andw
• au >ou, thenou > ō before dentals (þ,d,t,n,l,s,z,r) andh.
• e > i beforeu

• Class 1 has two subclasses, depending on the vowel in the past singular:
  • 1arītan rītu reit ritum giritan ("to ride")
  • 1blīhan līhu lēh ligum giligan ("to loan" – notegrammatischer Wechsel.)
• Class 2b verbs are rare, unlike in the more northern languages.
• A few relics of reduplication remain:
  • ana-stōzan ana-sterōz ("to strike")
  • pluozan pleruzzun ("to sacrifice"), in Upper German with the change b > p
  • ki-scrōtan ki-screrōt ("to cut"), in Upper German with the change g > k
  • būan biruun ("to dwell"); this was not a class 7 strong verb originally

Changes from Old High German toModern German:

• io,ia,ie >ī (spelled <ie>)
• ei, ī > ai (retaining the spelling <ei>)
• ou, ū > au
• ȳ > ɔy (spelled <eu> or <äu>)
• i > ī (spelled <ie>) before a single consonant.
• Alternations between past singular and plural are eliminated by generalising part 3 or part 2. If part 3 is generalised in verbs with alternations of thes-r type, it is not just generalised to the past singular but also to the present.

The classes are still well preserved in modern German.

Class 1

In class 1, part 3 is generalised, eliminating the older-ei- or-e-. However, a new subdivision arises because thei of the past tense forms is lengthened toie before a single consonant.reiten ritt geritten ("to ride") versusleihen lieh geliehen ("to loan"). Class 1 verbs in modern German are:

• Class 1 with a long vowel in the preterite and participle (aɪ̯-i:-i:) :bleiben,gedeihen,leihen,meiden,reiben,scheiden,scheinen,schreiben,schreien,speiben /speien,steigen,treiben,zeihen

• Historically weak roots:beigen (Swiss german),preisen,schweigen,speisen (Swiss german)

• Class 1 with a short vowel in the preterite and participle (aɪ̯-ɪ-ɪ) :beißen,befleißen (archaic),bleichen,gleißen (dialectal),gleiten,greifen,keifen,kneifen,reißen,reiten,scheißen,schleichen,schleifen,schleißen,schmeißen,schreiten,spleißen (archaic),streichen,streiten,weichen.

• Historically weak roots:gleichen,pfeifen,weisen

• Anomalous class 1 roots: The verbsleiden andschneiden preserved the verner alternation: "leiden – litt – gelitten, schneiden – schnitt – geschnitten".

Class 2

In class 2, part 2 is generalised, eliminating older-u-. Class 2b verbs are rare, as in Old High German.

• Class 2a with a long vowel in the preterite and participle (i:-o:-o:) :biegen,bieten,fliegen,fliehen,frieren,klieben,schieben,stieben,verlieren,wiegen,ziehen.
• Class 2a with a short vowel in the preterite and participle (i:-ɔ-ɔ) :fließen,genießen,gießen,kriechen,riechen,schießen,schliefen,schließen,sieden,sprießen,triefen.

Anomalous class 2a roots:

• The rootssieden andziehen have preserved the verner alternation: "sieden – sott – gesotten" and "ziehen – zog – gezogen"
• The rootslügen ("to tell a lie") andtrügen ("to deceive"), have changed their present tense vowels from 'ie' to 'ü'. This no doubt arises from a desire to disambiguate Middle High Germanliegen fromligen (class 5), which would have sounded the same after vowel lengthening.Trügen would have followed in its wake, because the two words form a common rhyming collocation.
• The verbkiesen has become obsolete, however the strong past tense and past participle are still used. Some speakers reinterpreted these forms as if they are part of the related verbküren, creating the pattern:küren-kor-gekoren.

In German class 2b was never large, the modern language retains the following verbs:krauchen,saufen,saugen,schnauben.

Class 3

In class 3, part 2 is generalised. Theo of the 3b participle has been passed by analogy to some 3a verbs, and also to the past of some verbs of both groups:beginnen begann begonnen,bergen barg geborgen ("to rescue"),quellen quoll gequollen ("to well up"). Thus, there are now 5 subgroups:

Class 3a

• regular (ɪ-a-ʊ) :binden,dingen (by analogy),dringen,finden,gelingen,klingen,ringen,schlingen,schwinden,schwingen,singen,sinken,springen,stinken,trinken,winden,winken (by analogy),wringen,zwingen.
• with substitution of o in the participle (ɪ-a-ɔ) :beginnen,gewinnen,rinnen,schwimmen,sinnen,spinnen.
• with substitution of o in the preterite and participle (ɪ-ɔ-ɔ) :glimmen,klimmen.

Class 3b

• regular (ɛ-a-ɔ) :bergen,bersten,gelten,helfen,schelten,sterben,verderben,werben,werfen.
• with substitution of o in preterite (ɛ-ɔ-ɔ) :dreschen,fechten,flechten,melken,quellen,schmelzen,schwellen,zerschellen.

Anomalous class 3 roots:

• The rootwerden generalizes part 3 instead of part 2 (ɛ-ʊ-ɔ), and also suffixes -e;werden, wurde, geworden. The original (part 2) singular preteriteward is still recognizable to Germans, but is archaic.
• The rootlöschen replaced the vowel of the infintive with 'ö' (œ-ɔ-ɔ).
• The rootschallen can be declined with a strong past tense in 'o'.
• The rootschinden which was originally weak, acquired an anomalous strong inflection with 'u' (ɪ-ʊ-ʊ).

Class 4

In class 4, the long-a- of part 3 was generalised to part 2. Example:nehmen nahm genommen ("to take").

• Class 4 with long vowels in the present tense (eː-a:-o:) :befehlen,gebären,stehlen.
• Class 4 with long vowels and substitution with o in preterite (eː-o:-o:) :gären,scheren,schwären,wägen,weben,bewegen.
• Class 4 with a long vowel in the present tense and short in the participle (eː-a:-ɔ) :nehmen.
• Class 4 with short vowels in the present tense and participle (ɛ-a:-ɔ) :brechen,schrecken,sprechen,stechen,treffen.

Several of these verbs have been moved into this class from other classes.sprechen andtreffen were originally class 5,befehlen was originally class 3, andstechen was originally class 1 (having had a change in the present vowel).schrecken was originally a weak verb and remains weak in transitive use.

Anomalous:

• kommen ("to come") still has the anomalouso in the present stem (although some dialects have regularised it tokemmen):kommen kam gekommen

Class 5

Class 5 is little changed from Old High German, like class 4 the long-a- of part 3 was generalised.

• Class 5 with long vowels in the present tense and participle (e:-a:-e:) :geben,genesen,geschehen,lesen,sehen,treten.
• Class 5 with short vowels in the present tense and participle (ɛ-a:-ɛ) :essen,fressen,messen,vergessen.

• The verbessen ("to eat") had a past participlegiezzan in OHG; in MHG this becamegeezzen which was contracted togezzen and then re-prefixed togegezzen.
• j-presents:bitten,liegen,sitzen.

Anomalous:

• The preterite ofsein ("to be") is Old High German:was/wârun, but levelled in modern German:war/waren.

Class 6

Class 6 is also preserved. In Modern German theuo is monophthongised tou.

• Class 6 with long vowels in present tense and participle (a:-u:-a:) :fahren,graben,laden,schlagen,tragen.
• Class 6 with short vowels in present tense and participle (a-u:-a) :backen,schaffen,wachsen,waschen.backen is usually weak nowadays.

Anomalous class 6 roots:

• The j-presentsheben,schwören have taken ano in the preterite and participle, perhaps by analogy with class 2:heben hob gehoben. The verbschwören has changede toö.
• The past tense and participle ofstehen (stand, olderstund,gestanden), which derive from a lost verb*standen, also belong to this class.
• With a strong participle only:mahlen
• The rootfragen acquired a rarely used strong inflection beside the historically weak forms.

Class 7

In class 7, the various past tense vowels have merged into a single uniform-ie-.

• Class 7a: onlyheißen, asscheiden has become a class 1 strong verb.
• Class 7b:hauen,laufen,stoßen
• Class 7c:fallen,halten

• fangen,hängen have back-formed new present stems from the past stem, and have eliminatedgrammatischer Wechsel and shortened the vowel in the past tense:fangen fing gefangen ("to catch"),hängen hing gehangen ("to hang").
• The past tense and participle of Germangehen,ging gegangen, derive from a lost verb*gangen which belongs to this class. (The verb still exists in other languages, such as the verbgang used in Scotland and northern England.)
• With a strong participle only:falten,salzen,spalten

• Class 7d:blasen,braten,lassen,raten,schlafen
• Class 7e:rufen

The following changes occurred from West Germanic to Old Saxon:

• ai >ē
• au >ō
• eu >io

From Old Saxon to Middle Low German:

• u >o
• io >e

As in Middle Dutch Lengthening of vowels in open syllables:e >ē,o >ō,a >ā,ö >ȫ, ü >ǖ.i Is often lengthened toē.

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There is no single Modern Low German, and some sources gives different forms than this. E.g. see

• Alfred v. d. Velde:Zu Fritz Reuter! Praktische Anleitung zum Verständniß des Plattdeutschen an der Hand des ersten Kapitels des Fritz Reuter'schen Romanes: "Ut mine Stromtid". Zweite Auflage. Leipzig, 1881, p. 60–63
• Julius Wiggers:Grammatik der plattdeutschen Sprache. In Grundlage der Mecklenburgisch-Vorpommerschen Mundart. Zweite Auflage. Hamburg, 1858, p. 57 ff.

Some differences:

• They haveböd, böden instead ofbood, boden,föll, föllen instead offull, fullen,stürw, stürwen, storwen instead ofstorv, storven, storven.
• They havespreken withsprök (thus not "4 regular (e-o-a)")

From Middle Low German to Modern Low German:

• ā >ē
• ō >ā except beforer
• a >o in preterite forms
• e >a/ö when followed by two different consonants

Most classes are quite well preserved, although the cohesion of some has been lost substantially or even entirely.

• Class 1 verbs in Low German arebieten, blieven, blieken, diegen/diehen, drieven, glieden, griepen, kieken, lieden, lieken, mieden, rieten, schienen, schieten, schrieden, schrien/schriegen, schrieven, slieken, sliepen, slieten, smieten, snieden, splieten, stiegen, strieden, strieken, swiegen, verdwienen, wieken, wiesen, wrieven and the originally weak verbsglieken,kniepen,priesen by analogy. Some other verbs take either strong or weak past endings:piepen,riesen andspieten.
• In class 2, part 2 is generalised, eliminating older -u-. Unlike in German but as in Dutch and English, class 2b has grown by moving older class 2a verbs into it. They arebeden, bedregen, kesen, legen, flegen, fleten, freren/fresen, geneten, geten, krepen, reken, scheten, spreten, tehn, verleren/verlesen; with ū-present:bugen, krupen, schuven, snuven, sluten, supen, sugen, stuven. The verbsrüken andstöven show anomalous infinitive forms. Some verbs can take either strong or weak past endings:duken andschulen.
• In class 3, the form of the past participle seems to have been generalised to preterite forms. There are now 5 subgroups + two olders subgroups reduced to one verb each:
  • 3a regular (i-u-u):binnen, dringen, drinken, dwingen, finnen, gelingen, klingen, ringen, slingen, swinnen, swingen, singen, sinken, springen, stinken, wringen. Verbs that may take either strong or weak past endings:blinken, glimmen andklimmen.
  • 3a with ü-infinitive (ü-u-u):begünnen, swümmen
  • 3b regular (a-o-o):bargen, basten/barsten, starven, verdarven, warpen, warrn, warven
  • 3b with ö-infinitive (ö-o-o):hölpen, smölten
  • 3b with e-infinitive and -u- past forms because of phonetical influence of -ll- (e-u-u):gellen, schellen, swellen
  • 3b with e-infinitive (e-o-o):fechten
  • 3b with e-infinitive and different preterite and past participle forms (e-o-a) due to analogy with class 4 verbs:befehlen.
• In class 4, parts 2 and 3 seem to have merged into -ē-, but due to the influence of past participle forms mostly with a -ō- sound (nowadays written -ā-) a new ending -ō- has arisen:
  • 4 regular (e-o-a):breken, schrecken (with vowel lengthening:schrook, schraken),spreken, stehlen.
  • 4 with two possible preterite forms (e-o/e-a):nehmen, steken
  • 4 with a-infinitive (a-o-a):drapen

The verbkamen still shows the -u- infinitive which became -a-:kamen, keem, kamen. The verb to be,wesen, levelled its old preterite formswas/weren intoweer/weren, althoughwas still appears in some dialects.

• In class 5 too the -ē- forms of past participle seem to have influenced the preterite forms. Class 5 regular verbs (ē-ē-ē) include:eten, geven, schehn (preteritescheh orscheeg), lesen (nowadays mostly a weak verb), meten, sehn (preteriteseeg)and vergeten. Verbs with j-presents:bidden (sometimes confused withbeden), liggen, sitten.

The verbtreden is anomalous as it has kept the -a- infinitive forms in the preterite and with the variation in vowel length, thus it hastradd,traddst,tradd in the singular with[a] buttraden in the plural with[ɒː]. However, normal class 5 preterite formstreed, treedst, treed, treden may also be found.

• Class 6 is preserved as well however it has lost its cohesion. Regular class 6 verbs (ā-ō-ā) aregraven andslaan (with anomalous infinitive and past participleslaan from earlierslagen). The 3 inherited j-presents have chosen different paths to make their past forms:heven is now similar to a class 5 verb and hasheev in the preterite andheven in the past participle,schapen is a weak verb with strong past participleschapen andswören kept its preteriteswoor as well as its past participlesworen – even though it may found with weak past forms.

The verbfohren is now merging withföhren and takes weak past endings. The verbdregen has an anomalous infinitive in -ē- but has kept its class 6 past formsdroog,drogen (preterite) anddragen (past participle). The verb laden has gone weak but hasladen besidelaadt in the past participle. The past tense ofstahn (stunn), which derives from Middle Low Germanstanden, also belongs to this class.

Finally the verbwaschen shows preteritewusch and past participlewuschen, just likefallen, fangen andhangen, they seem to make a new strong verb class.

• In class 7, the various past tense forms have merged into a uniform -ee-.
  • 7a (ē-ē-ē) has one single verb:heten sincescheden has gone weak.
  • 7b (ō-ē-ō) also includes one verb:lopen,stoten has gone weak but it kept its strong past participlestoten.
  • 7c has lost cohesion. 7c verbholen (from Old Saxonhaldan) has regularheel in the past tense and past participleholen, butfallen, fangen, hangen andgahn (from Old Saxongangan) showfull andfullen,fung andfullen,hung andhungen,gung/güng (but past participlegahn) in the preterite and past participle, all with a short -u-. Class 6 verbwaschen has also joined this "new class" and has preterite and past participlewusch andwuschen.
  • 7d (ā-ē-ā) verbs include:laten andslapen,raden andbraden are semi-strong as they still have their strong past participlesraden andbraden (though a weak formbraadt may be encountered).Blasen has gone weak.
  • 7e (ō-ē-ō) is reduced to one single verb:ropen. This subgroup had become similar to 7b already in Old Saxon.

Changes from Proto-Germanic toOld Norse:

• ē > ā
• a-mutation:u >o whena follows in the next syllable. This affected the past participles of classes 2–4. However, an interveningm orn + consonant blocked this, so the past participle of class 3a keptu.
• Extension of umlaut to back vowels, causing it to apply also to verbs of class 6.
• v- is lost beforeu oro.
• -n is lost from the infinitive and many inflectional endings.
• Voiced plosives (but not fricatives) are devoiced word-finally. In Old West Norse, this later causes loss of a preceding nasal.
• Breaking ofe toja in most environments, and ofeu tojū/jō.

• In class 7, several reduplicated verbs are retained:róa reri ("to row"),sá seri ("to sow"),snúa sneri ("to turn").

Class 1

This class has generalised part 2 over part 3 creating a past tense in 'e'. The class can be split up by the different vowels the supine can take:

• with 'e' supine:blive,drive,fise,glide,gnide,gribe,hive,knibe,pibe,ride,rive,skride,skrige,skrive,slibe,snige,stige,svide /svie,svige,vige,vride.
• with 'i' supine:bide,fnise,lide,skide,slide,smide,stride,trine.

Class 2

This class has generalised part 2 over part 3 creating a past tense in 'ø'. The class can be split up by the different vowels the supine can take:

• with 'u' supine:bryde,byde,fortryde,lyde,skyde.
• with 'y' supine:betyde,flyde,fnyse,gyde,gyse,nyde,nyse,skryde,snyde.
• with 'ø' supine:fyge,krybe,ryge,smyge,stryge.

Anomalous:

• fryse – frøs – frosset
• flyve – fløj – fløjet
• lyve – løj – løjet

Class 3

This class has disintegrated into a number of smaller subgroups, all its members have generalised part 2 over part 3 creating a past tense with 'a'.

class 3a:

• with 'i' in present tense and 'u' supine:binde,drikke,finde,rinde,slippe,spinde,springe,stikke,svinde,svinge,tvinde,tvinge,vinde.
• with 'i' in present tense and 'i' supine:briste,klinge,stinke.
• with 'y' in present tense and 'u' supine:synge,synke.

class 3b:

• with 'æ' in present tense and 'u' supine:brække (strong forms are archaic),hjælpe,sprække,trække,træffe.
• with 'æ' in present tense and 'æ' supine:gælde,hænge,skælve

Class 4

Class 4 has most of its members moved to class 3. It is marked by 'a' in the past tense and å in the supine. Regular class 4 strong roots:bære,skære,stjæle

Anomalous: These two verbs were influenced by a preceding 'w':

• sove – sov – sovet
• komme – kom – kommet

Class 5

Class 5 this class has lost cohesion. It is marked by 'å' or 'a' in the past tense and the supine has the same vowel as the infinitive.

• With å in the past:se,æde
• With a in the past:bede,gide,give,kvæde,sidde

Anomalous:

• ligge – lå – ligget
• tie – tav – tied
• være – var – været used to belong to this class as well but has irregular present tense iner.

Class 6

Class 6 is marked by 'o' in the past tense and the supine has the same vowel as the infinitive.

Regular strong roots:drage,fare,jage,lade,tage.

Anomalous:

• le – lo – let/leet
• slå – slog – slået (slaget)
• stå – stod – stået
• sværge – svor – svoret

Class 7

Danish has removed the vowel alternation between the past and present tenses (except for få and gå)

• class 7a:hedde – hed – heddet
• class 7b:løbe – løb – løbet
• class 7c:falde – faldt – faldet,holde – holdt – holdt

• anomalous:få – fik – fået,gå – gik – gået

• class 7d:græde – græd – grædt

Changes from Old Norse to modernNorwegian Nynorsk:

• á > å
• Long vowels are usually no longer marked as such: é > e, í > i, ó > o, ú > u, ý > y, œ/ǿ > ø
• jó/jú > y

• In class 6, one verb,fara (to fare, travel), has retained its marked long vowel:fór.
• Multiple of the verbs found in class 7 in Old Norse have gone weak. For instance, althoughheite (7a) have retained its strong preterite, it has lost its strong supine.

Class 1

Unlike Danish, this class is still uniform in Swedish, all verbs have an ‘e’(eː) in the past tense, the supine has the same vowel as the present tense.

Regular class 1 verbs (iː-eː-iː):bita,bliva /bli,driva,fisa,glida,gnida,gripa,kliva,knipa,kvida,lida,niga,pipa,rida,riva,skina,skita,skrida,skrika,skriva,slita,smita,snika,sprida,stiga,strida,svida,svika,tiga,vika,vina,vrida

Verbs for which the strong forms are dated:lita,smida,snida,trivas

Class 2

In Swedish this class split up into multiple patterns all verbs have an ‘ö’ (øː) in the past tense:

2a

• With 'y' in the present tense and 'u' in the supine (yː-øː-ʉː):bryta,drypa,flyga,flyta,frysa,klyva,knyta,krypa,nypa,nysa,ryta,skryta,smyga,snyta,stryka,tryta,
• With 'y' in the present tense and a shortend 'y' in the supine (yː-øː-ʏ):dyka,fnysa,fyka,lyda,mysa,pysa,ryka,rysa,strypa,
• With 'ju' in the present tense and 'ju' in the supine (ʉː-øː-ʉː):bjuda,gjuta,ljuda,ljuga,ljuta,njuta,sjuda,skjuta,tjuta

2b

• Class 2b looks similar to the 2a verbs with ‘ju’ (ʉː-øː-ʉː):sluka,sluta,stupa,suga,supa,duga (former preterite-presens)

Other

• A new pattern that is associated with the class 2 inflections emerged in the modern language with short vowel instead of the normal long ones (ɵ-œ-ɵ). It containssjunga,sjunka (both former class 3a verbs), and by analogyhugga (former class 7b) which adopted this pattern as well.

Class 3

Class 3a is well preserved and has a predictable pattern, with 'a' in the past tense and 'u'(ɵ) in the supine. Class 3b on the other hand has shrunk in the modern language to only a few members, most of the remaining verbs now often appear with weak forms as well, making this subclass fairly unstable.

Regular class 3a verbs (ɪ-a-ɵ):binda,brinna,brista,dimpa,dricka,finna,förnimma (originally class 4),gitta,hinna,klicka,klinga,rinna,simma (also weak),sitta (originally class 5),skrinna,slinka,slinta,slippa,spilla (also weak),spinna,spricka,springa,spritta,sticka,stinga,stinka,svinna (försvinna),tvinga,vinna

Regular class 3b verbs (ɛ-a-ɵ:):smälla,skälva,smälta,svälta,värpa

Anomalous: The verbvarda, is declinedvart-vorden. But it is now only used in the past tense (as an alternative for the past tense ofbliva)

Class 4

This class has become small, only three regular verbs remain, they have a long ‘a’ (ɑː) in the past tense and a long ‘u’ (ʉː) in the supine.

Regular class 4 verbs (ɛː-ɑː-ʉː):bära,stjäla,skära

The following verbs are influenced by a preceding ‘w’ which was lost:

• komma – kom – kommit
• sova – sov – sovit

Class 5

With å (oː) past:äta,se,ligga

With a (ɑː) past:be /bedja,dräpa (strong forms are poetic),förgäta,ge /giva,kväda

Anomalous:

• vara used to belong to this class as well but has irregular present tense in 'är'.

Class 6

With 'a' in present tense and supine (ɑː-u:-ɑː):begrava,dra /draga,fara,gala,ta /taga

With 'å' in present tense and 'a' in the supine (oː-u:-ɑː):slå,två (now mostly weak)

Anomalous:

• dö – dog – dött
• le – log – lett
• stå – stod – stått
• svära/svärja – svor – svurit
• växa – växte – vuxit

Class 7

• 7b:löpa – lopp – lupit (nowadays mostly weak)
• 7c:hålla – höll – hållit,falla – föll – fallit

• anomalous:få – fick – fått,gå – gick – gått

• 7d:gråta – grät – gråtit,låta – lät – låtit

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