Period 15
1. knew / would go
2. hadn't been
3. returned
4. didn't invite
5. did / do / were
6. would come
7. rang
8. were
9. were
10 had
11. would feel
12. offered
Period 16
1. would have bought
2. would have seen / had gone
3. had had
4. had been / would have visited
5. would have fed
6. didn't rain
7. would have written
8. had played / would have won
9. did
10. had known
11. had had
12. had been
Period 17
4. rings
5. were
6. is
7. was
8. had been
9. had
10. hadn't had
11. had driven
12. didn't read
