1. had started
2. had lived
3. had eaten
4. had listened
5. had left
6. had finished
7. had been
8. had met
9. had forgotten
10. had studied
11. hadn't rained
12. hadn't paid
13. hadn't done
14. hadn't eaten
15. hadn't brought
16. hadn't visited
17. hadn't met
18. hadn't had
19. hadn't used
20. hadn't studied