1. Andy is tired because he (WORK) 7 days a week, (BECOME) independent. 2. By 1960 most of the Britain's old colonies 3. David broke his leg when he (SKI) last week. 4. you (HAVE) a nice time in Rome during your last holiday ? 5. you (FINISH) your homework yet? 6. He (WORK) at his computer for the last 6 hours. 7. For how long she (HAVE) her car ? 8. How many people (DIE) in the fire yesterday? 9.1 (NOT/KNOW) much about art, but I like some artists. (WAIT) for ages. At last, the bus arrived. 10.1 11.1 (RECEIVE) a postcard from Jane yesterday. 12. Tom and Sam (play) soccer next Sunday. 13.1 (NEVER/BE) sailing, what is it like? 14. She (RIDE) her bike in the park at the moment. 15. It (RAIN) when I got up . 16. Janet (START) a new job last September. 17. Nelly (HAVE) a great time in N.Y. at the moment. 18. She was cooking dinner when we (ARRIVE) 19. She (COME BACK) from the cruise in a week. 20. My friends (BE) free for most of the evening. 21. The children were tired because they (SWIM)

Давайте разберём каждое предложение, чтобы правильно использовать времена глаголов:

1. Andy is tired because he has been working 7 days a week to become independent. (Present Perfect Continuous для выражения длительной работы, ведущей к усталости)
2. By 1960 most of Britain's old colonies had become independent. (Past Perfect для события, которое произошло до определённого момента в прошлом)
3. David broke his leg when he was skiing last week. (Past Continuous для действия, происходившего в момент получения травмы)
4. Did you have a nice time in Rome during your last holiday? (Past Simple для вопроса о событии в прошлом)
5. Have you finished your homework yet? (Present Perfect для действия, которое могло произойти и иметь отношение к настоящему)
6. He has been working at his computer for the last 6 hours. (Present Perfect Continuous для действия, продолжающегося до настоящего момента)
7. For how long has she had her car? (Present Perfect для выражения продолжительности вплоть до настоящего момента)
8. How many people died in the fire yesterday? (Past Simple для события, произошедшего и завершившегося в прошлом)
9. I don't know much about art, but I like some artists. I was waiting for ages. At last, the bus arrived. (Present Simple для общего утверждения и Past Continuous для длительного действия в прошлом)
10. I received a postcard from Jane yesterday. (Past Simple для события, произошедшего в прошлом)
11. Tom and Sam are going to play soccer next Sunday. (Going to Future для запланированного события в будущем)
12. I have never been sailing, what is it like? (Present Perfect для действий, не происходивших до настоящего момента)
13. She is riding her bike in the park at the moment. (Present Continuous для действия, происходящего прямо сейчас)
14. It was raining when I got up. (Past Continuous для действия, происходившего в момент другого действия в прошлом)
15. Janet started a new job last September. (Past Simple для события, произошедшего в конкретное время в прошлом)
16. Nelly is having a great time in N.Y. at the moment. (Present Continuous для текущего удовольствия)
17. She was cooking dinner when we arrived. (Past Simple для события, произошедшего в определённый момент в прошлом, когда другое действие уже происходило)
18. She will come back from the cruise in a week. (Simple Future для будущего действия)
19. My friends are free for most of the evening. (Present Simple для текущего состояния)
20. The children were tired because they had been swimming. (Past Perfect Continuous для длительного действия до другого момента в прошлом)