10. My father used to go to school on foot
11. He used to be late for school
12. They used to go to Vung Tau at weekends
13. I'd rather you not came to class late (S1 would rather (that) S2 Ved/ not Ved
14. When did you last see Tom?
15. It's time you went to school (It's time for S to V = It's time S Ved)
16. John used to smoke a lot a year ago, but now he doesn't any more
17. I'd rather you kept silence in class
18. I wish he could come here (S wish S Ved: ước trong hiện tại)
19. She hasn't visited her cousin for 3 months
20. We wish we could go out