English definition of “be”
strong /biː/ weak /bi/, /bɪ/ verb (present participle being, past tense was, past participle been)
DESCRIBE › used to describe or give information about someone or something: I'm sixteen. I'm Andy. Her mother is a teacher. He's German. They were very upset. He was very ill last year. I'm sorry I'm late. They've been unlucky. Be quiet!
there is/there are/there was, etc › used to show that someone or something exists: There were about fifty people at the party. Is there a bank near here?
POSITION › used to show the position of someone or something: It's been in the cupboard for months. She's in the kitchen.
it is/it was, etc › used to give a fact or your opinion about something: It's not surprising that she left him. It's a good idea to keep a spare key somewhere safe.