1. watching (spend + Ving)
2. doing
3. not to be
4. locking (remember + Ving: nhớ một việc đã làm trong quá khứ)
5. to invite
6. to wear
7. to be cleaned
8. involve
9. watching (enjoy + Ving)
10. to travel
11. visiting (consider + Ving: cân nhắc làm gì)
seeing (look forward to Ving: mong đợi điều gì)
12. to ask
13. to study
14. asking (avoid + Ving: tránh né)
15. joining
16. to miss
17. playing
18. reading
19. to go out
20. laughing (can't help Ving: không thể không...)
21. to go out
22. to help
23. to finish (stop to V: dừng để làm gì)
24. practicing
25. feel
26. to go
27. to perform
28. saying
29. listen
30. understand
