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Irregular verbs

Verbs whose stem is not the same in all tenses and moods are called irregular. The most important change is the vowel alternation between the stem of the present tense, the stem of the preterite tense, and the stem of the past participle.

In the example list below, the respective stems are highlighted: the present stem, the preterite stem, and the perfect stem.

Principal parts of irregular verbs:

Present     Preterite    Past participle
gehen ging gegangen
fahren fuhr gefahren
verlieren verlor verloren
All irregular verbs


Inflection tables of irregular verbs

The irregular verbs differ from the regular verbs in the wordforms of the preterite and in the past participle.

Simple tenses:
Present participle
Past participle
Complex tenses: 
Past perfect
Future I
Future II

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