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How Do You Figure Out If German Verbs Are Regular Or Irregular?

Updated: Dec 28, 2023

Many German grammar books and most German teachers will tell you that you simply need to memorise which verbs are regular and which ones are irregular. Yet, while there is no strictly logical rule that would allow you to identify verbs as regular or irregular, there are several rules rules of thumb and some reliable patterns that will make your life easier.

Let’s start with a general definition. Regular verbs, sometimes also called “weak verbs”, keep their original stem, while irregular (or “strong verbs") have a stem change. While the stem in and of itself doesn’t tell you whether the verb is regular or irregular, there are some clues. However, here you face a chicken and the egg situation; for it is true- at least as far as the present tense in German is concerned- that you need to learn the most common irregular verbs in German by heart. Otherwise, you couldn't logically work out which verb is regular and which one is irregular. The good news is, once you do know that a verb is irregular, you can apply the following patterns to figure out how their stem might change.

Present tense

In the present tense, the most common common patterns are as follows:

e - i

ich spreche

du sprichst

er/sie/es spricht

wir sprechen

ihr sprecht

sie/Sie sprechen

Also werden (used to construct the future tense in German), geben, nehmen, essen, gelten, helfen, vergessen, treffen, sterben.


e - ie

ich lese

du liest

er/sie/es liest

wir lesen

ihr lest

sie/Sie lesen

Also sehen, empfehlen, geschehen.

a - ä

ich fahre

du fährst

er/sie/es fahrt

wir fahren

ihr fahrt

sie/Sie fahren

Also schlafen, anfangen, fangen einladen, braten, fallen, halten, lassen, raten, tragen, wachsen, wachsen.

Bear in mind that stem changes only happen in the singular and not in the plural, with the only exception being “sein”. As you can see from the above, normally the stem change happens on the second person singular (du) and the third person singular (er/sie/es). Only the modal verbs können, wollen, möchten, dürfen, mögen have a stem change on the first person singular as well.


ich kann

du kannst

er/sie/es kann

wir können

ihr könnt

sie/Sie können

To learn more about the conjugation of German verbs in the present tense, check out our post on the topic.

Past tenses

To figure out whether German verbs are regular or irregular in the past, there are two rules of thumb. One is to check the conjugation of the verb in the present tense. If there is a stem change in the singular, it is not only an irregular verb in the present tense but often also irregular in the past.

e.g. “fahren” conjugates er/sie/es fährt in the third person singular and is therefore irregular. And so is the past: gefahren is the past participle (in the Perfekt tense)- fuhr its Präteritum form.

However, there are exceptions, such as the verb “gehen”, which is regular in the present tense but irregular in the past. So my second rule of thumb is to consider the English language. If there is a stem change in English from present to past, it is a strong indication that the verb may be irregular in German as well.

e.g. to go in the present becomes went in the past, so gehen becomes gegangen in the Perfekt and ging in the Präteritum.

Again, there are exceptions, such as

buy- bought - kaufen- gekauft- kaufte

So when both rules of thumb let you down, you have to memorise whether or not the verb is irregular. The good news is that there are only about 200 irregular verbs in the German language, and since many of them can be worked out with the above patterns, there are very few you have to learn by heart.

Learn more about the German Präteritum tense and the Plusquamperfekt on our blog.

You might also be interested in my Ultimate Guide to Learning German. Check it out to learn how to learn German fast.

If you have any questions or comments, please email me. You will find more information about my German language school here.



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