Question 21: Jane failed to complete her project. That's why she is not considered for promotion now.


A. If Jane completes the project, she will not be considered for promotion now.


B. If Jane completed the project, she would not be considered for promotion now.


C. If Jane had completed the project, she would not be considered for promotion now.


D. If Jane had completed the project, she would not have been considered for promotion now.

Question 22: The kids didn’t pay attention to the teacher. They failed to understand the lesson.


A. The kids would have understood the lesson if they had paid attention to the teacher.


B. Although the kids paid attention to the teacher, they failed to understand the lesson.

C. The kids would understand the lesson if they failed to pay attention to the teacher.

D. Unless the kids failed to understand the lesson, they would pay attention to the teacher.

Question 23: The firefighters made every effort to put out the fire. The building was still burned down completely.


A. Had it not been for the firefighters’ every effort, the building would have been burned down completely.


B. Making every effort to put out the fire, the firefighters completely burned down the building.

C. The building was burned down completely despite every effort the firefighters made to put out the fire.

D. If the firefighters had made effort to put out the fire, the building wouldn’t have been burned down completely.


III. Select the option to indicate the sentence that is closest in meaning to each of the following questions.

Question 24: If I hadn’t played computer games all night yesterday, my eyes wouldn’t be so tired now.

A. My eyes would be so tired now if I hadn’t played too many computer games.

B. My eyes are so tired now because I played computer games all night yesterday.

C. My eyes are not tired now because I didn’t play computer games last night.

D. If I play too many computer games all day, my eyes will be very tired.

Question 25: If our house had a garden, we would have a barbecue party this weekend.

A. We would have had a barbecue party last weekend if we had had a garden.

B. We could have a barbecue party more often at weekends if our house had a bigger garden.

C. We can’t have a barbecue party this weekend because our house doesn’t have a garden.

D. As our house has a big garden, we can have a barbecue party this weekend.

Question 26: If it hadn’t been for the driver’s carelessness, the accident wouldn’t have happened.

A. But for the drivers’ carefulness, the accident wouldn’t have happened.

B. If the driver had been more careful, the accident wouldn’t have happened.

C. The accident wouldn’t happen if every driver were more careful.

D. Most of the accidents happen because the drivers are very careless.

Question27: I didn’t pass the exam, so I can’t go to university.

A. I wish I had passed the exam, and then I could go to university.

B. If I passed the exam, I could have gone to university.

C. If only I didn’t fail the exam; I’m sure I can go to university now.

D. Supposed that I passed the exam, I could go to university.

Question 28: She couldn’t tell you the truth because she didn’t know it.

A. Had she known the truth, she could have told you.

B. She wishes she had known the truth you told her.

C. If only she could tell you the truth that she knew.

D. Suppose she knew the truth, she would tell you.

Question 29: Jo locked her keys in the car and had to break the window to get in.

A. Jo would have to break the window to get it were she not to lock her keys in the car.

B. If Jo hadn’t locked her keys in the car, she wouldn’t have had to break the window to get in.

C. Should Jo lock her keys in the car, she will have to break the window to get in.

D. If Jo had broken the window to get in the car, she would have found the keys that she locked.

Question 30: Should you see my missing dog, please call me immediately.

A. If you had seen my missing dog, you could have called me.

B. If you see my missing dog, please call me as soon as possible.

C. If you had called me immediately, my dog wouldn’t have been missed.

D. My dog shouldn’t have been missed if I had been called immediately.

Question 31: Were the situation worse, would you call him?

A. Would you call him if the situation were worse?

B. If the situation got better, would you call him?

C. How about giving him a call if the situation is worse?

D. Should you call him if the situation is getting worse?

Question 32: Were it not for you, I would never go out at midnight.

A. If it were for you, I would go out at midnight.

B. If it were not for you, I wouldn’t go out at midnight.

C. Had it not been for you, I wouldn’t go out at midnight.

D. Because of you, I wouldn’t go out at midnight.

Question 33: If the players had been more focused, they would have won the game.

A. Had the players been more focused, they would have won the game.

B. If they won the game, the players would be more focused.

C. They would win the game were the players more focused.

D. Should the players focus more, they will win the game.

Question 34: Although his doctor requested him to stay in bed, he got up suffering an immediate relapse.


A. If only he had stayed in bed as the doctor requested, he would not have suffered a relapse.


B. Although he had tried to stay in bed as requested, he suffered an immediate relapse.

C. Having defied his doctor’s request to get up, he became ill again as soon as he stayed in bed.

D. As he was trying to get up, he remembered that his doctor had requested him to stay in bed.

Question 35: We are planning to have a picnic in the suburbs as long as the weather stays fine.

A. We’re planning to have a picnic in the suburbs despite the bad weather.

B. If the weather had been fine, we would have had a picnic in the suburbs.

C. If the weather is fine, we will have a picnic in the suburbs. 


D. If the suburbs are good enough, we will have a picnic there. 


Question 36: I regret spending too much money on games.

A. I wish I didn’t spend money on games.

B. I hope I won’t have to spend money on games.

C. If only I had not spent too much money on games.

D. I regret having spent too much money on games.

Question 37: If I had known your house address, I wouldn’t have sent it to your office.

A. Provided that I knew your house address, I would send it to your office.

B. Had I known your house address, I would have never sent it to your office.

C. I would send it to your office if I knew the address.

D. When I know your house address, I will send it to you

Question 38: Hanoi suffers alarming air pollution because of the heavy traffic.

A. But for the heavy traffic, the air in Hanoi wouldn’t be alarmingly polluted.

B. Unless Hanoi is alarmingly polluted, the traffic may not be so heavy.

C. Suppose Hanoi were heavily polluted, the traffic would be an alarming problem.

D. If Hanoi were less polluted, the traffic would be much heavier.

Question 39: If you don't stop eating candies, you will put on weight very quickly.

A. Stop eating candies, or you will put on weight very quickly.

B. You will put on weight very quickly though you eat candies.

C. You won't put on weight very quickly if you eat candies.

D. Unless you eat candies, you will put on weight very quickly.

a đù

Exercise 1: Rewrite the following sentences, using unless instead of if:

a. If you are not careful, you will cut yourself with that knife.

…………………………………………………………………………………………………………………..

b. If you do not like this one, I’ll bring you another.

…………………………………………………………………………………………………………………..

c. If she does not hurry, she will be late.

…………………………………………………………………………………………………………………..

d. I’ll not be able to do any work if I don’t have a quiet room.

…………………………………………………………………………………………………………………..

e. If she doesn’t water these tress, they will die.

…………………………………………………………………………………………………………………..

f. He will not stay here if he wants to go.

…………………………………………………………………………………………………………………..

Exercise 4. Put the verbs in the correct form
1. I enjoy (fish) .....................................because it (be) ……………….… relaxing.
2. Jane will play chess after she (finish) …………………………. school.

3. What …………………… your mother often (do) ………………………at weekends?

4. I think, in the future people (not play) ………………………………individual games.

5. I (read)……………….......................................six books for two months.

6. Amy (live) …………………………………..in Portugal when she was young.

7. She (visit)………………………………. her grandmother since last month.

8. I (go) ………………………………………….to the cinema last night.

31. You ____________disappointed if there ____________no snow for this winter holiday? 

A. Would be / was  B.  will be / is C.  will be / are      D. could be / is 

32. If she ____________yesterday, she would come here with us tomorrow night. 

A. finished it    B. finishes it    C. had finished it    D. has finished it 

33. If your father weren’t the president of the company, you ____________here. 

A. don’t work    B. won’t work    C. wouldn’t be working D. wouldn’t have worked  

34. If I ____________for an accounting firm, I would be working in a post-office. 

A. wasn't working B.  worked C. hadn't worked D. weren't working 

35. What would you have done if you ____________a lot of money? 

A. had  B. will  C. had had  D. have had 

36. If we had known that you were there, we____________ you a letter. 

A. would write        B. would have write C. would have written D. had written 

37. If we had checked the petrol before we started, we ____________here. 

A. wouldn't stop B. wouldn't have stopped  C. would have stopped    D. would stop 

38. “Did he study yesterday?”  “No, but if he _______, he would have done better on today’s test.” 

A. had    B. has    C. will study    D. had done 

39. My sister ____________you the technique of weaving if you ask her. 

A. would show B.  shows C. will show    D. showed 

40. She would be happy if we ____________her a bunch of flowers. 

A. had sent B. sent  C. would send    D. send 

41. If you don’t feel well, you_____________ better take a rest. 

A. are    B. would C. had      D. have 

42. What would you have done if you _____________ a lot of money? 

A. had    B. had had C. have had    D. have 

43. The movie was sad and she wept. If it_____________ sad, she_____________.

A. hadn’t been/ wouldn’t have wept B. wasn’t/ wouldn’t weep 

C. wasn’t/ would weep    D. had been/ would have wept 

44. I’ll be very disappointed if you _____________ the exam. 

A. don’t pass B. won’t pass C. aren’t passing D. wouldn’t pass 

45. If he _____________ harder, the results would be better. 

A. has worked    B. works    C. will work          D. worked 

46. If I had had free time, I _____________ shopping. 

A. would have gone  B. can go C. will go              D. will have gone 

47. _____________  if you take the map with you. 

A. You will get lost  B. You won’t get lost C. You get lost      D. You got lost 

48. If you had come to the party, you _____________ her. 

A. would meet B. had met    C. would have met D. met 

49. I’m not tired enough to go to bed yet. I wouldn’t sleep if I _____________ to bed now. 

A. go        B. went          C. had gone      D. would go 

50. If I were you, I _____________ that shirt. It’s much too expensive. 

A. won’t buy B. don’t buy    C. am not going to buy D. wouldn’t buy 

51. I decided to stay at home last night. I would have gone out if I _____________ so tired     .  

A. wasn’t    B. weren’t    C. wouldn’t have been D. hadn’t been 

52. "Did he lose?" "Yes, but if he had tried harder, he_____________ won." 

A. might  B. might have    C. might of    D. might has 

53. What will I do if no one _____________ me at the airport? 

A. meet    B. will meet    C. meets        D. met 

54. Jean gets very agitated if her daughter _____________ her once a week. 

A. doesn't ring    B. didn't ring    C. not ring            D. don't ring 

55. Without water and air, people die.  

A. People will die if there is no water and air.      B. If there were no water and air, people would die.       

C. People will not die if there is no water and air.   D. If there were no water and air, people would not die.  

56. If you_____________ that plane, you _____________ dead now. 

A. had caught / would have been   B. caught / would be   C. had caught / would be      D. catch / will be 

57. I would have said "good bye" to your brother if he_____________ there. 

A. could be    B. had been    C. will be              D. will have been 

58. If you_____________ what Nam is doing, you _____________ very surprised         

A. had known / would be   B. knew / would be C. knew / would have been  D. knew / will be 

59. I _____________ very happy if there _____________ a good film on channel 9 last night. 

A. would be / had been        B. would have been / would be 

C. would have been / had been    D. had been / had been 

60. If you see Tom, _____________ you mind _____________ him to get in touch with me? 

A. will / reminding    B. will / to remind C. would / reminding D. would / to remind

31. You ____________disappointed if there ____________no snow for this winter holiday? 

A. Would be / was  B.  will be / is C.  will be / are      D. could be / is 

32. If she ____________yesterday, she would come here with us tomorrow night. 

A. finished it    B. finishes it    C. had finished it    D. has finished it 

33. If your father weren’t the president of the company, you ____________here. 

A. don’t work    B. won’t work    C. wouldn’t be working D. wouldn’t have worked  

34. If I ____________for an accounting firm, I would be working in a post-office. 

A. wasn't working B.  worked C. hadn't worked D. weren't working 

35. What would you have done if you ____________a lot of money? 

A. had  B. will  C. had had  D. have had 

36. If we had known that you were there, we____________ you a letter. 

A. would write        B. would have write C. would have written D. had written 

37. If we had checked the petrol before we started, we ____________here. 

A. wouldn't stop B. wouldn't have stopped  C. would have stopped    D. would stop 

38. “Did he study yesterday?”  “No, but if he _______, he would have done better on today’s test.” 

A. had    B. has    C. will study    D. had done 

39. My sister ____________you the technique of weaving if you ask her. 

A. would show B.  shows C. will show    D. showed 

40. She would be happy if we ____________her a bunch of flowers. 

A. had sent B. sent  C. would send    D. send 

41. If you don’t feel well, you_____________ better take a rest. 

A. are    B. would C. had      D. have 

42. What would you have done if you _____________ a lot of money? 

A. had    B. had had C. have had    D. have 

43. The movie was sad and she wept. If it_____________ sad, she_____________.

A. hadn’t been/ wouldn’t have wept B. wasn’t/ wouldn’t weep 

C. wasn’t/ would weep    D. had been/ would have wept 

44. I’ll be very disappointed if you _____________ the exam. 

A. don’t pass B. won’t pass C. aren’t passing D. wouldn’t pass 

45. If he _____________ harder, the results would be better. 

A. has worked    B. works    C. will work          D. worked 

46. If I had had free time, I _____________ shopping. 

A. would have gone  B. can go C. will go              D. will have gone 

47. _____________  if you take the map with you. 

A. You will get lost  B. You won’t get lost C. You get lost      D. You got lost 

48. If you had come to the party, you _____________ her. 

A. would meet B. had met    C. would have met D. met 

49. I’m not tired enough to go to bed yet. I wouldn’t sleep if I _____________ to bed now. 

A. go        B. went          C. had gone      D. would go 

50. If I were you, I _____________ that shirt. It’s much too expensive. 

A. won’t buy B. don’t buy    C. am not going to buy D. wouldn’t buy 

51. I decided to stay at home last night. I would have gone out if I _____________ so tired     .  

A. wasn’t    B. weren’t    C. wouldn’t have been D. hadn’t been 

52. "Did he lose?" "Yes, but if he had tried harder, he_____________ won." 

A. might  B. might have    C. might of    D. might has 

53. What will I do if no one _____________ me at the airport? 

A. meet    B. will meet    C. meets        D. met 

54. Jean gets very agitated if her daughter _____________ her once a week. 

A. doesn't ring    B. didn't ring    C. not ring            D. don't ring 

55. Without water and air, people die.  

A. People will die if there is no water and air.      B. If there were no water and air, people would die.       

C. People will not die if there is no water and air.   D. If there were no water and air, people would not die.  

56. If you_____________ that plane, you _____________ dead now. 

A. had caught / would have been   B. caught / would be   C. had caught / would be      D. catch / will be 

57. I would have said "good bye" to your brother if he_____________ there. 

A. could be    B. had been    C. will be              D. will have been 

58. If you_____________ what Nam is doing, you _____________ very surprised         

A. had known / would be   B. knew / would be C. knew / would have been  D. knew / will be 

59. I _____________ very happy if there _____________ a good film on channel 9 last night. 

A. would be / had been        B. would have been / would be 

C. would have been / had been    D. had been / had been 

60. If you see Tom, _____________ you mind _____________ him to get in touch with me? 

A. will / reminding    B. will / to remind C. would / reminding D. would / to remind

II. Make conditional sentences, using if or unless. 1. Ican't finish this task if you don't give me a hand. 2. You will run out of money if you don't stop wasting it. 3. Don't call me unless it is an emergency. 4. James will not pass the test unless he studies harder. 5. If Jane finishes her work before 6 p.m, she will dine out with her friends. 1. Work hard and you will pass your exam. If 2. My brother is not good at playing tennis. My brother does not . 3. r'll be on vacation next week, so I won't be able to attend the meeting. Since 4. If you don't start working hard now, you won't be able to pass the final test. Unless . 5. Someone should take this garbage to the garbage dump soon. This garbage 1. I am a member of the anti-pollution program in my school. I often go to school by bus. (so) 2. The trees in this area were cleaned off. Public facilities would be constructed. (because of) 3. All the roads were flooded because it had been raining heavily. (due to) 4. Jimmy ate a lot of fast food, so he put on 10kilograms within just two months. (because) 5. My father got upset because I repeatedly left on the lights I was not using. (so)

When I finish my work, I will call you 
-> If
Don't go out or you will not have enough time to do your test
-> If
Do more exercise or you will not improve your health
-> If you don't
Protect the environment or environmental will be contaminated
-> If
Reduce light pollution or animal will change their behaviour patterns
-> If
Reduce light pollution or animal will change their behaviour patterns
-> If
Decrease water temperature or some aquatic creatures will be unable to reproduce
-> If
Don't increase the water pollution or we will get more sickness
-> If