Answer:
1. simple past
2. simple present
3. simple past
4. simple future
5. simple present
6. past perfect
7. future perfect
8. past perfect
9. past progressive
10. present progressive
11. future progressive
12. past perfect progressive
13. present perfect progressive
14. future perfect progressive
15. present perfect progressive
16. future progressive
17. past perfect
18. simple present
19. past perfect
20. present progressive
