1. was reading- was watching

2. came-switched-checked

3. snuck-stole- left

4. didn't listen- was explaining

5. were doing- were lying

6. waked- looked

7. was having-rang

8. was smoking- was reading

9.was mowing- started

10. was having- blew

11. came- was waiting

12. saw- was driving

13. was waiting- was doing

14.arrived- were having

15. were playing- were going

16. were having- was sleeping

17. was taking-fed

18. were playing-went

19. were cleaning- was doing

20. was doing- phoned

21. were waiting- arrived

22. was you doing-tried

23. was also watching

24. called- wasn't- was working

25. walked- was talking

26. was watching

27. was crossing- struck

28. lived- was living

1. While Tom (read) was reading , Amely (watch) was watching a documentary on TV.

2. Marvin (come) came home, (switch) switched on the computer and checked(check) his emails.

3. The thief (sneak) sneaked into the house, (steal) stole the jewels and left(leave) without a trace.

4. Nobody (listen) listented  while the teacher (explain) was explaining the tenses.

5. While we (do) were doing a sight-seeing tour, our friends (lie) were living on the beach.

6.  He (wake) woke up and (look) looked at his watch.

7. They ……were having (have)tea when the doorbell …rang (ring)….. 

8.  Father was smoking (…smoke)…his pipe while mother was reading (read)……a magazine

9. While he was mowing (mow) the lawn it started (start) to rain

10. He was having  (have) breakfast when the toaster  blew  (blow) up

11. When I   came  (come) into the office my boss  was wating  (wait) for me. 

12.  When we saw     (see) Brian he   was driving  (drive) a taxi. 

13. Father  was wating   (wait) in the car while mother did   (do) the shopping

14.  When he   arrived  (arrive) we  were having   (have) dinner.

15. While they were playing   (play) chess we  went  (go) shopping.

16. They had   (have) a party while he was sleeping   (sleep).

17.  He  took  (take) a photo when I  was feeding   (feed) the ducks. 

18. They were playing    (play) football when the lights in the stadium went   (go) out.

19. While George and John  were cleaning  (clean) their room she  did  (do) the ironing.

20. Sam   was doing   (do) the ironing when Jack   phoned  (phone) her. 

21. We were waiting (wait) at Victoria station when the train arrived (arrive).

22. A:What were you doing (you/do) when the accident(happen) happend?

B : I was trying (try) to change a light bulb that had burnt out.

23. Sandy is in the living room watching television.  At this time yesterday, she.was also watching (watch/also)television.That's she all ever does!

24. A: -I called (call) you last night after dinner, but you weren't (be/not) there. Where were you?

B : - I have worked (work) out at the fitness center.

25.  When I (walk) walked into the busy office, the secretary (talk) was talking on the phone with a customer.

26.  I (watch) was watching a mystery movie on TV when the electricity went out.

27. The Titanic (cross) was crossing the Atlantic when it (strike) struck an iceberg.

28. Samantha (live) lived in Berlin for more than two years. In fact, she (live) was living there when the Berlin Wall came down.

CHÚC BN HỌC TỐT!NHỚ VOTE 5* VÀ CTLHN CHO MIK NHA!