Глагол to be в Past Simple, Present Simple и Future Simple.

The students .... in the Russian Museum.

My sister .... ill last week.

He .... in St Petersburg tomorrow.

Where .... you yesterday?

Where .... your books now?

Where .... the keys? In your jacket.

Everybody in the family ... very glad to see him at home again.

Yesterday we .... at the theatre.

When I come home tomorrow, all my family .... at home.

He ... with his family now.