IV. Rewrite the following sentences using if 1. He can’t go out because he has to study for his exam.  ……………………………………………………………………………………… 2. She is lazy so she can’t pass the exam.  ……………………………………………………………………………………… 3. He will pay me tonight; I will have enough money to buy a car.  ……………………………………………………………………………………… 4. He smokes too much; that’s why he can’t get rid of his cough.  ……………………………………………………………………………………… 5. She is very shy, so she doesn’t enjoy the party.  ……………………………………………………………………………………… 6. I will get a work permit. I will stay for another month.  ………………………………………………………………………………………… 7. He doesn’t take any exercises. He is so unhealthy. …………………………… 8. We can’t get the ticket because I don’t have the right change.  ……………………………………………………………………………………….. 9. Study hard or you won’t pass the exam. …………………………………………. 10. Don’t be impatient or you will make mistakes. …………………………………… Exercise 3: Use UNLESS instead of IF EX: If you do not study hard, you will fail the exam. ->Unless you study hard , you will fail the exam 1. If you do not like this one, I’ll bring you another ->Unless……………………………………………… 2. If she does not hurry, she’ll be late ->Unless ………………………………………………. 3. If you are not careful, you’ll cut yourself ->Unless …………………………………………………… 1. Unless they were absent now, they would meet the head master. => If ........................................................................... 2. Unless he cleaned up the car now, his boss could ask him to do this. => If ........................................................................... 3. If I didn’t know the number, I would not ring her up.=> Unless ................................................................. 4. If Peter didn’t study hard, he could not get good marks.=>Unless................................................... 5. If my sister didn’t have a terrible headache she wouldn’t be absent from her class. => Unless ........................................................................... 6.Unless he refused everything, he would lose his family. If.............................................................................................................................. Bài 1: : Use “ if” in place of “ unless” 1/ We won’t go out unless it stops raining. -______________________________________________ 2/ I will call the police unless you give back my bicycle. -_______________________________________ 3/ You wouldn’t be able to do this exercise unless your English were good. -_________________________ 4/ Unless we had enough rain, we couldn’t grow rice. -_______________________________________ 5/ The fishermen couldn’t have caught a lot of fish unless they had had good nets. -_____________________ 6/ I wouldn’t buy it unless I could afford it. -___________________________________________ 7/ I would refuse to go unless they paid my expenses. -_______________________________________ 8/ I don’t agree with his economic policy. I wouldn’t vote for him unless he changed it. -________________ 9/ He wouldn’t have written unless he had heard news. -_______________________________________ 10/ You might not have a terrible toothache unless you went to the dentist regularly . II.Put the verbs in brackets in to the correct forms 1. The photograph would have been much better if it (be) lighter in the room.………………………… 2. He (die) if the surgeon hadn’t operated on him.…………………………………… 3. Please don’t disturb him if he (be) busy.………………………………… 4. If ice (be) heavier than water, it wouldn’t float.……………………………………………………… 5. If you had strained your ears, you (hear) a slight noise in the bushes.……………………………… 6. If you had done as I talk you, you (succeed).…………………………………… .7. If I followed his advice, I (be) a fool.…………………………………………… 8. If I (lose) my license, I shall lose my job. …………………………………………………… 9. If he had gotten one more mark, he (pass) the exam.……………………………………… 10. If I make a promise, I (keep) it.…………………………………………………………… 11. If I (have) enough money, I will buy a new skateboard.…………………………………… 12. I would have been glad if he (visit) me in hospital.……………………………… .13. If they were rich, they (stay) at a hotel.……………………………………………… 14. If he had offered me the job, I (take) it.………………………………………………… 15. She will be angry if you (not, tell) the truth.………………………………………………………… 16. If Jack (come) to my party, I would have danced with him.……………………………… 17. If he (drive) more carefully, he would not cause an accident.…………………………………… 18. The Millers (move) to the seaside if they had had children.…………………………… .19. If they take their medicine, they (feel) better.…………………………… 20. If you had asked me, I (tell) you.……………………………… 21. We (not, get) good marks if we don’t learn hard.…………………………………… .22. They would be glad if the rain (stop) soon.…………………………………………………… 23. If he (not, go) back now, he will be late.……………………………………… 24. If we had gone to London, we (see) the Tower ………………………………………… . 25. What on earth would you do if the brakes of your car