The Strong Verb Ablaut Classes

Norwegian strong verbs change their stem vowel to form the past — drikke → drakk → drukket — instead of adding a dental ending. The A2 page verbs/strong-verbs-overview introduces the principle; this page goes deeper, sorting the strong verbs into their ablaut classes by vowel pattern. The payoff is real: once you recognise a verb's class, you can derive all three principal parts from the model verb, and — because Norwegian and English inherited the same Germanic ablaut series — you can frequently guess the Norwegian forms straight from the English cognate. Ride / rode / ridden tells you ri / red / ridd; sing / sang / sung tells you synge / sang / sunget. That cognate shortcut is the single most powerful tool an English speaker has here, and most courses never mention it.

What "ablaut class" means

A strong verb has three principal parts: infinitive / preterite / supine (the har-form). The vowel changes across these in a fixed pattern — the ablaut series. We name each class by its three vowels: the i–a–u class is drikke (i) → drakk (a) → drukket (u). Learn one model verb per class and the others in that class follow the same vowel path.

Two honest caveats up front. First, the classes are a learning aid, not a law: real verbs drift between classes, and a few are genuinely irregular. You still memorise the principal parts of each verb — the classes just make them stick. Second, the consonants can shift too (doubling in the supine: funnet, bundet), so attend to spelling, not only the vowel.

Class i–a–u: drikke / drakk / drukket

The classic three-way ablaut, with a nasal or liquid + consonant after the vowel (-nn-, -ng-, -nd-). English keeps it almost intact: drink / drank / drunk, sing / sang / sung, find / found / found, win / won / won.

Note the supine doubles its consonant and takes u: funnet, vunnet, bundet — never finnet or fant. And sitte belongs here by vowel logic (sitte → satt → sittet), even though its supine keeps i; treat it as a near-member to learn alongside.

Class i–e–e: skrive / skrev / skrevet

The long-i stems that lower to e. English: write / wrote / written, drive / drove / driven, ride / rode / ridden, bite / bit / bitten.

Two sub-patterns hide here. Verbs with a single consonant after the vowel keep the long supine in -evet/-epet (skrevet, grepet). Verbs whose stem ends in -t shorten the supine to -itt/-edd (bitt, ridd). The preterite, though, is reliably e: skrev, grep, bet, red.

Class y/ju–ø–ø: bryte / brøt / brutt

Stems with y or ju that round to ø in both past forms. English cognates lie in fly / flew / flown, freeze / froze / frozen, and the -eu- of older spellings.

The preterite is consistently ø (brøt, frøs, nøt, skjøt; fløy with the -øy diphthong). The supine splits: single-consonant stems keep u/o (brutt, skutt, frosset), while -yte stems with -tt shorten (nytt). Watch the kj/skj spelling in skyte → skjøt → skutt: the soft fricative surfaces only before the front vowel.

Class a–o–å: ta / tok / tatt (and the fare type)

A smaller, partly irregular group where a in the infinitive goes to o in the preterite. Some, like fare / for / fart, keep the path clean; others, like ta and dra, are high-frequency irregulars you simply memorise.

These don't map as neatly onto a single English class — take / took / taken is the best anchor. The supines double the t (tatt, dratt, grått). The older preterite drog still appears in writing but dro is the everyday form.

Class e–a–e: gi / ga / gitt and the give/eat type

A set whose infinitive e/i gives a preterite in a and a supine back in e/i. English: give / gave / given, eat / ate / eaten, bid / bade / bidden, lie / lay / lain.

This class is the loosest of the five — ligge lengthens to lå, se gives så — but the give / gave / given model captures the spirit: an a-vowel preterite framed by e/i on either side. Both ga and the more formal gav are correct; likewise ba alongside literary bad.

The cognate shortcut, used in anger

Put the English column to work. Faced with an unfamiliar Norwegian strong verb, find its English cousin and read off the class.

• synke — English sink / sank / sunk → i–a–u → synke / sank / sunket.
• stige — pattern of rise / rose / risen (also "rise/ascend") → i–e–e → stige / steg / steget.
• skjære — English shear / shore / shorn → skjære / skar / skåret.

The shortcut is a strong guess, not a guarantee — synke lands exactly where English predicts, but always verify against a wordlist, because a handful of verbs have drifted classes since the two languages split. Still, starting from the cognate puts you in the right neighbourhood far more often than starting from nothing.

Honest difficulty: the classes don't fully predict

Be clear-eyed: the classes organise the chaos but do not eliminate it. Gi gives gitt while the look-alike bli gives blitt — different classes despite rhyming infinitives. Several verbs allow two preterites (ga/gav, bet/beit, dro/drog), where the second is more formal or older. And the supine consonants double unpredictably (funnet vs skutt vs gitt). So memorise the three principal parts of each strong verb as a unit — the class label and the English cognate are scaffolding to make that memorisation fast, not a substitute for it.

Common Mistakes

1. Cross-applying another class's vowels. Borrowing the i–a–u supine for an i–e–e verb (or vice versa) is the classic slip.

2. Reusing the preterite vowel in the supine. In the i–a–u class the preterite has a but the supine jumps to u.

3. Single consonant in a doubling supine. Class i–a–u supines double: funnet, vunnet, bundet.

4. Forgetting the kj/skj spelling shift. Skyte keeps sky- in the infinitive but spells skjøt in the preterite.

5. Weak-conjugating a strong verb. Adding -et or -te to a vowel-change verb erases its strong identity.

Key Takeaways

• Strong verbs sort into ablaut classes named by their three vowels: i–a–u (drikke), i–e–e (skrive), y/ju–ø–ø (bryte), a–o–å (ta), e–a–e (gi).
• Each class maps closely onto an English strong-verb class, so the English cognate is a powerful first guess: sing/sang/sung → synge/sang/sunget.
• Watch the supine spelling: it often doubles a consonant and takes its own vowel (funnet, bundet, skutt) — distinct from the preterite vowel (fant, bandt, skjøt).
• The classes are a memory aid, not a rule: drift, dual forms (ga/gav), and irregular consonants mean you still learn the three principal parts per verb.