Sein is a German irregular verb meaning to be. Sein appears on the 100 Most Used German Verbs Poster as the #1 most used irregular verb.
Sein Conjugation: Present Tense
*Irregular forms in bold.
Sein Present Perfect
The past participle of Sein is gewesen. The present perfect tense is formed by combining the auxiliary verb sein with the past participle.
Sein Simple Past
The simple past of Sein is war.
Regular vs. Irregular Verbs
A verb is called a regular verb when its conjugation follows a typical pattern. A verb which does not follow these patterns exactly is called an irregular verb. In German, the 3 regular patterns are for verbs ending in en, eln/ern, and ten.
German Conjugation Chart
Looking for more verbs like Sein? Check out our German Conjugation Chart, the 100 Most Used German Verbs Poster!