his
The German verb sein means 'to be' in English. It is an irregular verb and one of the most important verbs in the German language.
verb
Meaning: to be (as a copula verb)
Ich bin glücklich.
I am happy.
Meaning: to exist
Es ist ein schöner Tag heute.
It is a beautiful day today.
Meaning: to belong to
Das Buch ist mir.
The book belongs to me.
Meaning: to indicate time or date
Heute ist Montag.
Today is Monday.
Meaning: to have as a quality or characteristic
Er ist intelligent.
He is intelligent.
A1: Ich bin müde.
A1: I am tired.
A1: Du bist mein Freund.
A1: You are my friend.
A2: Wir sind in der Schule.
A2: We are at school.
B1: Ich war gestern im Kino.
B1: I was at the cinema yesterday.
B1: Du wirst bald Urlaub haben.
B1: You will soon have vacation.
B2: Er ist seit einem Jahr in Deutschland gewesen.
B2: He has been in Germany for a year now.
C1: Sie wäre gerne Lehrerin geworden, aber es hat nicht geklappt.
C1: She would have liked to become a teacher, but it didn't work out.
C1: Wenn ich Zeit hätte, würde ich gerne reisen.
C1: If I had time, I would like to travel.
C2: Hätte ich gewusst, dass es so schwierig wird, hätte ich es nicht gemacht.
C2: If I had known that it would be so difficult, I wouldn't have done it.
Sein is used to indicate existence, identity, possession, location, and time. In its infinitive form, it is sein, and its conjugated forms include bin, bist, ist, sind, seid, and sind. The verb is often used with a subject complement that describes or identifies the subject of the sentence.
Sein is also used as an auxiliary verb to form the present perfect tense (Perfekt) and past perfect tense (Plusquamperfekt). In these cases, it is combined with the past participle of another verb. For example: Ich bin gegangen (I have gone), Du warst gekommen (You had come).
In addition to its grammatical functions, sein has cultural significance in Germany. It is used in many idiomatic expressions and proverbs, such as Es ist nicht alles Gold, was glänzt (All that glitters is not gold) and Sei kein Frosch! (Don't be a chicken!). Its irregular conjugation can make it challenging for learners of German, but mastering this verb is essential for speaking and writing fluently.