1. Yesterday they were in the library.
2. She is at school now.
3. Tomorrow they will be in the theater.
4. At the moment he is not here.
5. On Sunday he will be at the concert.
6. Last Saturday he was at the stadium.
7. My brother is at school now.
8. My brother was at the cinema yesterday.
9. My brother will be at home tomorrow.
10. Will you be at home tomorrow?
11. Was she at the park yesterday?
12. Is he in the yard now?