Chia động từ:
1. In all the world, there (be) only 14 mountains that (reach) above 8,000 meters.

2. He sometimes (come) to see his parents.

3. When I (come) , she (just leave) for Dalat .

4. My grandfather never (fly)  in an airplane, and he has no intention of ever doing so.

5. He told me that he (take)  a trip to California the following week.

6. Right now I (attend) class. Yesterday at this time I (attend) class.

7. The traffic was very heavy. By the time I (get) to Mary’s party, everyone already (arrive) 

8. I (visit) my uncle’s home regularly when I (be)  a child.

9. That book (be)  on the table for weeks. You (not read) it yet ?

10. David (wash) his hands. He just (repair) the TV set.

11. You (be) here before? +Yes, I (spend) my holidays here last year.

12. We never (meet)  him. We don’t know what he (look) like.

13. The car (be)  ready for him by the time he (come) tomorrow.

14. On arriving at home I (find) that she just (leave) a few minutes before.

15. When we (arrive)  in London tonight, it probably (rain) .

16. It (rain) hard. We can’t do anything until it (stop) 

17. Last night we (watch) TV when the power (fail) .

18. I (sit) down for a rest while the shoes (repair) .

19.Half way to the office Paul (turn) round and (go) back home because he (forget) to turn the gas off.

20. London (change) a lot since we first (come) to live here.

21. While we (talk) on the phone the children (start) fighting and (break) a window

22. He used to talk to us for hours about all the interesting things he (do) in his life.

23. You know she (stand) looking at that picture for the last twenty minutes.

24. I (spend) a lot of time travelling since I (get) this new job.

25. When we (be) at school we all (study) Latin.

26. When I (meet)  him , he (work) as a waiter for a year.

27.After he (finish) breakfast he (sit) down to write some letters.
28.28. She (have) a hard life, but she’s always smiling. 

29.There’s someone behind us we think we (follow)

30) We watched the children (jump) from a window and (fall) into a blanket (hold)by people below .

31) I wish you ( let) me (know) the truth . I (not go) to all this trouble if I (know) it.

 32) If you (tell) me you (already buy) the book. I (not give) it to you as a birthday present but now it (be) too late 

33) I wish you (tell) us last week that you were in  London .If I (know) in time you (not have to) stay in a hotel.

34) Would he be angry if you (take) his bike without asking?

35, The man (sit) next to me was nervous because he (not fly) before.

36.Before I ( go ) out for walk, I ( say ) goodye to my perents.

37. When he let us come in , we ( wait) out side the exam room for over half and hour.