Chia động từ tổng hợp về thì:
1. He (be) will be being to the theater three times this month.
2. I can't go out because I ( not, finish) don't finish my work.
3. Since his wife (die) dead he (smoke) has smoked a lot.
5. There (be) have been no rain here for six months.
6. He (not, go) didn't go out since he (have) has had his car stolen.
8. It (rain) is raining. for two days now. There will be a flood soon.
9. I'm on diet. I (eat) am eating nothing but bananas for the last few months.
11. The radio (play) has played since 7 a.m. I wish someone would turn it off.
12. The pipe (leak) leaked for ages. We must get it mended.
13. It (snow) is snowing for three days now. The road will be blocked if it doesn't stop soon.
14. Your fingers are very brown. You (smoke) are smoking. too much so far.
16. I only (hear) hear from him twice since he went away.
17. He (teach) has taught in this school for five years.
18. It (rain) has rained for two hours, so the matcg has to be postponed.
19. This time last month I (sit) have sat on a beach.
23. When I last saw me she (wear) was wearing my new dress.