1. This is the first time Hoa (meet) has met Tim's family.
2. What were you (do) doing this time yesterday ? I (work) worked on the computer.
3. Yesterday the light (go) was gone out while we (have) were having dinner.
5. Do you mind if I (ask) ask you a private question.
8. The trees are (plant) planted by this father.
9. The new bridge will (build) be built by the and of the year.
10. The garbage can (use) be used to make fertilizer.
12. They asked me (repair) to repair the tablẹ.
14. I didn't know what (say) to say when I met him yesterday.
15. Mary has decided (go) to go to Vietnam this summer.
16. This is the first time my mother (be) has been to Hanoi.
17. We have never (see) seen rice paddies before.
19. The child (sit) sitting near the tree is my brother.
20. The novel (write) written by Mr Quang is interesting.
22. At this time yesterday I (study) was studying in the library.
23. They (run) ran home while it (rain) was raining at 5p.m yesterday.
24. When Nam (come) came I (sleep) was sleeping at 9 yesterday.
25. While I (work) was working on the computer, the earthquake happend.
26. How long have you (live) lived here.
27. How long have you (learn) learnt English? For 4 years.
28. Have you (tidy) tidied the bedroom yet?
29. I (already write) have already written the lesson.
30. That street (not repair) hasn't been repaired yet.