Purpose

By the end of this lesson, you will be able to correctly form the perfect tense and know when to use “haben” and when to use “sein” as the auxiliary verb.

Lesson Explanation

The perfect tense is by far the most common past tense in spoken German (unlike the simple past, next lesson, which is used more in writing), and is formed with an auxiliary verb (Part 1, Lesson 4) plus a participle.

Most verbs use haben as the auxiliary: Ich habe gespielt. (I have played.) Regular participles are formed with ge- and -t: spielen → gespielt.

A genuinely important, German-specific special case — similar to the Italian essere/avere system from an earlier-built Gabal course: a specific group of verbs instead uses sein as the auxiliary, mainly verbs of motion and change of state: gehen → Ich bin gegangen. (to go), fahren → Ich bin gefahren. (to drive/travel), werden → Ich bin geworden. (to become), sterben → Er ist gestorben. (to die).

Unlike the Italian system, however, German has NO participle agreement with the subject — the participle stays unchanged in both auxiliary groups, regardless of gender or number: Sie ist gegangen. and Sie sind gegangen. (the participle “gegangen” stays identical, a genuinely simpler aspect compared to Italian).

Irregular participles must be learned individually: sehen → gesehen, essen → gegessen, kommen → gekommen (with “sein”).

Practice Questions