Exercise 17
Put the verbs in brackets into correct tenses:
1. If I __________ (know) his telephone number, I'd give it to you.
2. You could make better progress if you __________ (attend) class regularly.
3. If you __________(arrive) ten minutes earlier, you would have got a seat.
4. He could get a job easily if he __________(have) a degree.
5. I shouldn't have believed it if I __________(not see) it with my own eyes.
6. John talks to his dog as if it __________(understand) him.
7. If they had left the house earlier, they __________ (not be) so late getting to the airport
that they could not check their baggage.
8. If I finish the dress before Saturday, I __________(give) it to my sister for her birthday.
9. If I had seen the movie last night, I __________(tell) you about it.
10. If you __________(be) a millionaire, how would you spend your time?
11. If Peter paid his debts, people __________(respect) him more.
12. If I __________(own) an automobile, I would take a trip to California.
13. If she __________(work) harder, she would probably get a better salary.
14. If I __________(find) the book, I shall give it to you.
15. If you __________(turn) out the light, we shall be in the dark.
16. If you __________(save) your money, you will be able to go on a vacation.
17. He might get fat if he __________(stop) smoking.
18. What you __________(do) if you found a burglar in your house.
19. If she __________(not hurry), she may be late.
20. If I __________(try) again, I think that I would have succeeded.
21. Water __________(not run) downhill if there were not gravity.
22. If I tell you a secret, you __________(promise) not to tell it to anyone else?
23. Mary wished that the editors __________(permit) him to copy some of their material.
24. Jim wishes that he __________ (spend) his vacation on the Gulf Coast next year.
25. I __________(accept) if they invite me to the party.
Exercise 18
Unless or If ...not:
1. If you are not careful, you will cut yourself with that knife.

5. I regret that you didn't give me a chance to tell you the truth.
..................................................................................................................................................
6. Mary is afraid she won't be able to attend your wedding next week.
..................................................................................................................................................
7. We regret that we didn't have enough money to buy that house.
..................................................................................................................................................
8. You drive too fast. I'd like you to drive more slowly.
..................................................................................................................................................
9. You are too lazy. The teacher wants you to be more studious.
..................................................................................................................................................
10. I'm not a doctor.
..................................................................................................................................................
11. I haven't enough money to buy that book.
..................................................................................................................................................
12. I live in the city, but I don't like it.
..................................................................................................................................................
13. Minh is sorry now that he didn't accept the job.
..................................................................................................................................................
14. We have to work this Sunday.
..................................................................................................................................................
15. I feel sick because I ate too much ice -cream.
..................................................................................................................................................
16. It's a pity that you were not here last week.
..................................................................................................................................................
17. I want the baby to stop crying.
..................................................................................................................................................
18. The hotel wasn't good.
..................................................................................................................................................
19. I didn't understand the lesson.
..................................................................................................................................................

 She put the meat into the oven............................................................................................
13. The boy stood on the bench. he want to get a better view.
 The boy stood on the bench.................................................................................................
14. We lower the volume of the radio. We don't want to bother our neighbour.
 We lower the volume of the radio.......................................................................................
15. I'll write to you. I want you to know my decision soon.
 I'll write to you....................................................................................................................
16. These men were talking in whispers. They didn't want anyone to hear him clearly.
 These men were talking in whispers ................................................................................
17. The man spoke loudly. He wanted everybody to hear him clearly.
 The man spoke loudly........................................................................................................
18. James often goes home as soon as the class is over. He doesn't his parents to wait for
him.
 James often goes home as soon as the class is over.........................................................
19. Doris gets up early. She doesn't want to be late for class.
 Doris gets up early...........................................................................................................
20. Mary hid the novel under the pillow. She didn't want her father to see it.
 Mary hid the novel under the pillow...............................................................................
21. Alice prepares her lesson carefully. She wants to get high marks in class.
 Alice prepares her lesson carefully.................................................................................
22. The robber changed his address all the time. He didn't want the police to find him.
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 The robber changed his address all the time..................................................................
23. They did their work well. They hoped the boss would increase their salary.
 They did their work well...............................................................................................
24. We turned out the lights. We didn't want to waste electricity.
 We turned out the lights...............................................................................................
25. I whispered. I didn't want to disturb any one.
 I whispered ..................................................................................................................
Exercise 21

 His conduct...................................................................................................................
5. Laura has beautiful voice . We all like to hear he sing.
 Laura has......................................................................................................................
6. John is still very weak. He can't walk without a stick.
 John is.........................................................................................................................
7. My father has a very good health. He seldom takes any medicine.
 My father....................................................................................................................
8. There is too much noise. we can't learn our lessons.
 There is.......................................................................................................................
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9. My friend is very strong. He can lift up the table himself.
 My friend...................................................................................................................
10. Bill is an intelligent boy. He is always at the top of his class.
 Bill is ........................................................................................................................
Exercise 23
Rewrite the sentences below, using "ENOUGH" instead of "TOO" :
1. This story is too dull too read.
 This book...................................................................................................................
2. We were too late to get good seats.
 We were....................................................................................................................
3. John is too lazy to make progress in his story.
 John is......................................................................................................................
4. I'm too poor to help you with the money.
 I'm............................................................................................................................
5. These oranges are too sour for us too eat.
 These oranges...........................................................................................................
6. The shelf is too high for the boy to reach.
 The shelf...................................................................................................................
7. This road is too dangerous for her to go out at night.
 This road.................................................................................................................