1. I am at home now.
2. He was at work yesterday.
3. She will not be at home tomorrow.
4. Children are in the park. They are not at school.
5. He was not at school yesterday. He was at home.
6. Where is she? She's at work.
7. I was a pupil last year. I'm student this year.
8. Where were you? We were in the theatre.
9. His father is a doctor. Will he be the doctor as well?
10. The children will be in the courtyard tomorrow.
11. Where are you? Aren't you at home?
12. My friend is ill. He's not in the institute. He's at home.
13. Where will you be tomorrow?
14. They weren't in Chrimea last year. They were in Kiev.
15. I'm not an engineer. I'm a singer.
16. We'll be in the cinema at 15 o'clock today.
17. Where are the books? They were on the table yesterday.
18. Will you be at school tomorrow? No, I won't. I am ill.
19. Was he ill last week? Yes, he was.
20. Why weren't they at home? They were in the theatre.