Irregular verbs — the reference

This lesson is less about a new rule and more about a mental map. German has roughly 200 irregular (strong + mixed) verbs, and the majority of the very-common ones cluster into a handful of vowel-change groups. Once you see the groups, memorization stops feeling random.

Three forms per verb matter: infinitive, Präteritum (simple past), Partizip II (past participle). Learn them as a triple — never alone.

Why three forms?

You build the rest of the verb's life from these three:

• Infinitive → Präsens, modal constructions, infinitive clauses, Futur.
• Präteritum → simple past, Konjunktiv II (for some verbs).
• Partizip II → Perfekt, Plusquamperfekt, passive, participles-as-adjectives.

The patterns at a glance

Below: the eight most useful vowel patterns plus the irregular core, all in one matrix. Row band shows the pattern; column endings are color-coded so the strong -en participle vs. the weak -t participle pops out instantly.

How to drill these

1. Read the row aloud. gehen, ging, ist gegangen. Hear the vowel shift.
2. Write a tiny sentence for each triple. Ich gehe zur Arbeit. Gestern ging ich zur Arbeit. Ich bin gestern zur Arbeit gegangen.
3. Re-encounter them in reading. Don't drill in isolation for hours — just refresh the table every few days and let the examples you read do the rest.

When patterns don't match

Some verbs (sein, haben, werden, bringen, denken, wissen, kennen) break every pattern. Treat them as their own thing. The common theme: they're super-high-frequency, so the irregularities got preserved from Old/Middle German while rarer verbs got regularized.

Common mistakes, named

1. Regularizing. Er geht → er gehte. ❌ → ging. ✓ If the verb is strong, it stays strong.

2. Forgetting aux changes. Ich habe gegangen. ❌ → Ich bin gegangen. ✓ Motion verbs → sein.

3. Mixing the Präteritum and Partizip. Ich ging gestern in die Schule is Präteritum (formal / written). Ich bin gegangen is Perfekt (spoken). Don't combine them.

Mini check

Where this leads

Now that you can narrate events, we move to describing things. Adjective endings — the part of German grammar that looks wild but is actually the most regular decoration system in the language.

Next up: Adjektivdeklination, part 1 — after the definite article.

Test yourself