Ответ:
2. Forgetting
3. Ought to (скорее всего
4. Might go
5. Cooking
6. Was painted
7. Had been searching
8. To ask
9. Tell
10. Taller
11. Didn't need to
12. Supposing
13. Was skiing
14. Hadn't left
15. Would write
16. Is working
17. Breaking
18. When