1. Have you ever seen a leopard?

2. A: When did you last write a letter?

B: Last week.

3. John isn't here. He has gone to the supermarket.

4. I haven't seen Bob at last Monday.

5. Lessons start at 10 o'clock in the morning.

6. Look at the children. They are swimming in the lake.

7. John hasn't phoned yet.

8. I can't walk. I sprained my ankle.

9. Sorry! I haven't cooked dinner yet.

10. We haven't been to the vallage when we were children.