Bài tập rèn luyện có điều kiện - Hoàng Văn Hoan

I. Put the verbs in brackets into their correct forms!
1. I would have read the letter if I___________ (know) it was from you.
2. If Tony doesn't help in the garden I__________ (not finish) my work in time.
3 .If you__________ (not tell) me about Maxwell's birthday I would forget it.
4. We_____________ (catch) the train earlier if Mary had found her purse.
5. If Susan____________ (learn) the poem she would have known the answer.
6. If it____________ (be) too hot we will stop and get a cold drink.
7. If it___________ (not rain) today I would stay it home.
8. If the Professor spoke clearly we__________ (understand) him better.
9. If you go on talking like that we__________ (throw) you out.
10. If Sasha__________ (go) home now he would meet his own brother.
11. If it rained, the streets__________ (be) wet.
12. If I__________ (not tell) Jim the address he wouldn't have found you.
13. The bird____________ (die) if you had caught it.
14. What___________ (you, do) if you won the lottery?
15. If the weather_________ (not change) we will reach the top of the mountain
.
16. Dinner__________ (be) fine if the meat weren't cold.
17. I'm sure Benny____________ (come) if you wait a bit longer.
18. If you ring the bell, somebody___________ (answer) it.
19. If Bert__________ (see) you, he would have talked to you.
20. You___________ (find) your ticket if you had looked into your pockets.
21. You___________ (fall) ill if you eat so much.
22. What___________ (happen) if the door had not be opened?
23. If Chris asked you for a cigarette,__________ (you, give) him one?
24. If you__________ (buy) that big car, you would need a lot of money.
25.___________ (You, change) the color of your hair if I asked you to do so?
26. If you give me the letter, I____________- (post) it for you.
27. ____________(You, post) the letter if I had given it to you?
28. If the weather is fine, I____________ (go) swimming.
29. If you____________ (not work) harder, you won't pass the exam.
30. If they___________ (be) rich, they would travel around the world.
31. The children__________ (go) skating if the lake were frozen.
32. What would you have done, if you___________ (lose) your handbag?
33. What will happen if you____________ (not know) the answer?
34. She__________(go) on holiday, if she hadn't been ill.
35. If I_______________ (notice) you, I would have said hello.
36. If I__________ (be) like you, I wouldn't watch such films.
37. If you opened your eyes, you___________ (see) a wonderful world.
38. People___________ (live) in peace if they stop fighting.
39. If Tom drinks so much, he_________ (cannot drive) home.
40. If we___________ (not hurry) we would miss the train.
41. He___________ (not spend) so much money if he weren't a happy person.
42. __________(You, come ), if you had had more time?
43. If Jim_________ (study) the new words he would have got a better mark.
44. If he were rich, he___________ (buy) the house.
45. If you don't hurry you___________ (be) late.
46. If it wasn't so hot, we___________ (play) football.
47. If I__________ (be) ill, would you visit me?
48. If Sean____________ (not be) driving so fast, the police would not have stopped him.
49.I f I had sold my house, I____________ (get) 4 million pounds.
50. If I____________ (be) you I would I would do it. 
II. Change the sentences that same meaning ( Unless = If.not )
If Andrew is not lazy, he will pass the final examination. (unless)
→
John will not catch the train unless he runs more quickly. (If)
→.
The tree will die if it isn’t watered every day. (unless)
→..
Life won’t be very easy if we don’t earn lots of money. (unless)
→.
If you don’t practice more often, your English won’t be better.
→
Jack will be dismissed if he doesn’t try to work harder.
→. 
You can’t run fast unless you try your best.
..
Unless you lived in the dormitory, you could annoy me.
..
Unless the young girl stops smoking, she won’t be healthy
.
Unless people knew you, they wouldn’t give you some precious information.
III.