Choose the best answer for each of the fllowing sentences
1. ............ if you work harder, you will be sacked.
A. Whether B. If C. However D. Unless

2. I think you should stop smoking.
A. If I am you, I will stop smoking B. If I were you, I will stop smoking
C. If I were you, I would stop smoking D. If I had been you, I would stop smoking

3. If you take the ice out of the fridge, it ...........
A. vaporizes B. melts C. heats D. disappears

4. We should do something to protect water from being polluted ........... we will have nothing to drink in the future.
A. if B. whether C. or D. unless

5. Let's knock on their door to see .......... home.
A. if they're B. unless they're C. whether they were D. if they were

6. Unless we .......... more snow, we can't go skiing.
A. will have B. have C. have had D. had

7. You'll fail the exam ........... you start revising.
A. if B. until C. when D. unless

8. Unless you wash the car, you .............. not drive it at the weekend
A. would B. could C. have to D. may

9. If Peter ............... his car before the drive, he ................ the problem of out of petrol.
A. cheked / will not get B. had checked / would not have got
C. checks / will not have got D. would be checking / will not have got

10. He stepped on the mine, and it exploded.
A. If he doesn't step on the mine, it doesn't explode.
B. If he doesn't step on the mine, it won't explode.
C. If he didn't step on the mine, it wouldn't explode.
D. If he hadn't step on the mine, it wouldn't have exploded.

1 If you (find) a skeleton in the cellar, don't mention it to anyone.

FIND

2 If you pass your examination, we (have) a celebration.

WILL HAVE

3 What (happen) if I press this button?

WILL HAPPEN

4 I should have voted for her if I (have) a vote then.

HAD HAD

5 If you go to Paris, where you (stay)?

WILL YOU STAY

6 If someone offered to buy you one of those rings, which you (choose)?

WOULD YOU CHOOSE

7 The flight may be cancelled if the fog (get) thick.

HAD GOT

8 If the milkman (come), tell him to leave two pints.

COMES

9 Someone (sit) on your glasses if you leave them there.

WILL SIT

10 You would play better bridge if you (not talk) so much.

DIDN'T TALK

11 What I (do) if I hear the burglar alarm?

WILL I DO

12 If you (read) the instructions carefully, you wouldn't have answered the wrong question.

HAD READ

13 I could repair the roof myself if I (have) a long ladder.

HAD

14 Unless they turn that radio off, I (go) mad.

WILL GO

15 If you were made redundant, what you (do)?

WOULD YOU DO

16 We'll have a long way to walk if we (run) out of petrol here.

RUN

17 If you shake that bottle of port, it (not be) fit to drink.

WON'T BE

18 I'll probably get lost unless he (come) with me.

COMES

19 You (not have) so many accidents if you drove more slowly.

WOULDN'T HAVE

20 If you (wear) a false beard, nobody would have recognized you.

HAD WORN

21 If she (leave) the fish there, the car will get it.

LEAVES

22 Unless they leave a lamp beside that hole in the road, somebody (fall) into it.

WILL FALL

23 You'll get pneumonia if you (not change) your wet clothes.

DON'T CHANGE

24 If I had known that you couldn't eat octopus, I (not buy) it.

WOULDN'T HAVE BOUGHT

25 If they (hang) that picture lower, people would be able to see it.

HUNG

26 She (be able) to walk faster if her shoes hadn't such high heels.

WOULD BE ABLE

27 I (bring) you some beer if I had known that you were thirsty.

WOULD HAVE BROUGHT

28 If you had touched that electric cable, you (be) elecrocuted.

WOULD HAVE BEEN

29 If the story hadn't been true, the newspaper (not print) it.

WOULDN'T HAVE PRINTED

30 I (not buy) things on the instalment system if I were you.

WOULDN'T BUY

31 Dial 999 if you (want) Police, Ambulance or Fire Brigade.

WANT

32 You (not be) any use to me unless you learn to type.

WON'T BE

33 If anyone attacked me, my dog (jump) at his throat.

WOULD JUMP

34 If he were in, he (answer) the phone.

WOULD ANSWER

35 The ship would have run around if the pilot (make) one mistake.

HAD MADE

36 I shouldn't have taken your umbrella if I (know) that it was the only one you had.

HAD KNOWN

Exercise 6 : Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she 2.If you_____to me, you wouldn’t have got so much trouble. A. listened B. would listen C. had listened D. Would have listened 3.If you don’t know how to spell a word, you_____ look it up in the dictionary. A. must B. will C. should D. ought 4.If the sun _____, we _____for a walk. A. shines / will go B. shone / will go C. shone / would go D. had shone / would go 5.The campfire _____ if it _____ last night. A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains 6.But for our parents, we _____ successful in life. A. will never be B. would never be C. wouldn’t have be D. would have never been 7.If I _____ my wallet at home this morning, I _____ money for lunch now. A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had 8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do. A. were / would know B. is / will know C. had been / would have known D. was / would know 9.If we _____ the plans carefully, we would not have had so many serious mistakes. A. study B. had studied C. studied D. were studying 10.I will never talk to you again _____ you apologize me _____ your being rude. A. if / for B. unless / for C. or / of D. whether / or 11._____if you work harder, you will be sacked. A. Whether B. If C. However D. Unless 12.I think you should stop smoking. A. If I am you, I will stop smoking. B. If I were you, I will stop smoking. C. If I were you, I would stop smoking. D. If I had been you, I would stop smoking. 13.If you take the ice out of the fridge, it _____. A. vaporizes B. melts C. heats D. disappears 14.We should do something to protect water from being polluted _____we will have nothing to drink in the future. A. if B. whether C. or D. unless 15.Let’s knock on their door to see _____home. A. if they’re B. unless they’re C. whether they were D. if they were 16.Unless we _____more snow, we can’t go skiing. A. will have B. have C. have had D. had 17.You’ll fail the exam _____ you start revising. A. if B. until C. when D. unless 18.Unless you wash the car, you _____not drive it at the weekend. A. would B. could C. have to D. may 19.If Peter _____his car before the drive, he _____the problem of out of petrol. A. checked / will not get B. had checked / would not have got C. checks / will not have got D. would be checking / will not have got 20.He stepped on the mine, and it exploded. A.If he doesn’t step on the mine, it doesn’t explode. B.If he doesn’t step on the mine, it won’t explode. C.If he didn’t step on the mine, it wouldn’t explode. D.If he hadn’t stepped on the mine, it wouldn’t have exploded. 21. In my experiments, the liquid is cooled to 32ºF. It always freezes. A.If you cool the liquid to 32 degrees, it froze. B.If you cooled the liquid to 32 degrees, it would freeze. C.If you cool the liquid to 32 degrees, it will freeze. D.If you had cooled the liquid to 32 degrees, it would have frozen. 22.It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled. A. If it rains, the match is cancelled. B. If it rains, the match will be cancelled. C. if it rained, the match would be cancelled D. If it had rained, the match would have been cancelled. 23.Unfortunately, I don’t know Philosophy, so I can’t answer your question. A.If I know Philosophy, I can answer your question. B.If I know Philosophy, I will be able to answer your question. C.If I knew Philosophy, I would be able to answer your question. D.If I had known Philosophy, I would have been able to answer your question. 24._____ there are some more ideas, we can end the meeting now. A. If B. As if C. Unless D. In case 25.If he _____with us now, he _____ the beauty of nature of the National Park. A. is / can enjoy B. was / will enjoy C. has been / would enjoy D. were / could enjoy 26.If they had searched more carefully, they...the watch sooner. A. will find B. would find C. found D. would have found 27.If I had got up early, I _____ to have breakfast now. A. have B.I had C. would have D. would have had 28.I cannot buy a new computer _____ I save enough money. A. if B. even if C. unless D. as if 29.Most people you meet will be polite to you _____. A. if you are polite to them B. if you will be polite to them C. unless you are polite to them D. if you were polite to them 30.If you do so, it _____ the matter worse. A. makes only B. would only make C. will only make D. had only made 31.You _____ English fluently unless you practice it every day. A. will speak B. will not speak C. can speak D. did not speak 32.Hurry up _____ you will miss the bus and be late for school. A. if B. and C. or D. as 33.You will get a good seat if you _____ first. A. come B. came C. have come D. will come 34.Sam will not graduate_____. A. if he passed all the tests B. if he does not pass all the tests. C. unless he passes all the tests D. unless he had passed all the tests. 35.If I had time, I would go with you. A.I am free and surely go with you. B.I am too busy to go with you. C. I will go with you because I have time. D. I am free enough to go with you. 36.If Margaret hadn’t been wearing a seat belt, she.... Injured. A. has been B. would has been C. would be D. would have been 37.If I _____ the rain yesterday, I_____ ill. A. had not caught / would have been B. had not caught / would have not been C. have not caught / were not D. have not caught / would have been 38.He looked frightened as if he _____ a ghost. A. sees B. is seeing C. has seen D. had seen 39.What _____if there _____ a serious nuclear accident. A. will happen / was B. happens / were C. would happen / were D. would happen / had been

Lần sau bn vt thì cách ra cho dễ nhìn nhé~~~~

Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she

2.If you_____to me, you wouldn’t have got so much trouble.

A. listened B. would listen C. had listened D. Would have listened

3.If you don’t know how to spell a word, you_____ look it up in the dictionary.

A. must B. will C. should D. ought

4.If the sun _____, we _____for a walk.

A. shines / will go B. shone / will go C. shone / would go D. had shone / would go

5.The campfire _____ if it _____ last night.

A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains

6.But for our parents, we _____ successful in life.

A. will never be B. would never be C. wouldn’t have be D. would have never been

7.If I _____ my wallet at home this morning, I _____ money for lunch now.

A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had

8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do.

A. were / would know B. is / will know C. had been / would have known D. was / would know

9.If we _____ the plans carefully, we would not have had so many serious mistakes.

A. study B. had studied C. studied D. were studying

10.I will never talk to you again _____ you apologize me _____ your being rude.

A. if / for B. unless / for C. or / of D. whether / or

Task 2: Supply the correct verb form

1. If we meet at 9:30, we (have) ________will have_________plenty of time.

2. Lisa would find the milk if she (look) _______looked__________ for it in the fridge.

3. What (happen) _______will happen__________if I press this button?

4. The door will be unlocked if you (press)_________press________ the green button.

5. If you go to Paris, where will you (stay) _________stay________?

6. The flight may be cancelled if the fog (get) ________gets_________thick.

7. If the milkman (come) _______comes__________, tell him to leave two pints.

8. I (call) _______would call__________ the office if I were you.

9. Someone (sit) ________will sit_________on your glasses if you leave them there.

10. What will I (do) ______do___________if I hear the burglar alarm?

11. Unless they turn that radio off, I (go) _____will go____________mad.

12. If you were made redundant, what would you (do) _________do________?

13. If you spoke louder, your classmates (understand) __________would understand_______ you.

14. I'll probably get lost unless he (come) __________comes_______with me.

15. You (not have) _______wouldn't have__________ so many accidents if you drove more slowly.

16. If she (leave) _______leaves__________ the fish here, the cat will eat it.

17. Unless you (tell) _______tell___________ the truth, I won’t help you.

18. If they (hang) _____hung______ that picture lower, people would be able to see it.

19. She (be) ___was ______able to walk faster if she didn’t have such high-heel shoes.

20. Dan (arrive) _____would arrive____________ safe if he drove slowly.

~~~~~~~~~~~~~~~~~~~~~~~~~~

I.Put the verbs in brackets into the corect tenses

1 If you (find)find a skeleton in the cellar, don't mention it to anyone.

2 If you pass your examination, we (have)will have a celebration.

3 What (happen)will happen if I press this button?

4 I should have voted for her if I (have)had had a vote then.

5 If you go to Paris, where will you (stay)stay?

6 If someone offered to buy you one of those rings, which would you (choose)choose?

7 The flight may be cancelled if the fog (get)gets thick.

8 If the milkman comes(come), tell him to leave two pints.

9 Someone (sit)will sit on your glasses if you leave them there.

10 You would play better bridge if you (not talk)didn't talk so much.

11 What will I (do)do if I hear the burglar alarm?

12 If you (read)had read the instructions carefully, you wouldn't have answered the wrong question.

13 I could repair the roof myself if I (have)had a long ladder.

14 Unless they turn that radio off, I (go)will go mad.

15 If you were made redundant, what would you do(do)?

16 We'll have a long way to walk if we run(run) out of petrol here.

17 If you shake that bottle of port, it (not be)won't be fit to drink.

18 I'll probably get lost unless he comes(come) with me.

19 You (not have)wouldn't have so many accidents if you drove more slowly.

20 If you (wear)had worn a false beard, nobody would have recognized you.

21 If she (leave)leaves the fish there, the car will get it.

22 Unless they leave a lamp beside that hole in the road, somebody (fall)will fall into it.

23 You'll get pneumonia if you (not change)don't change your wet clothes.

24 If I had known that you couldn't eat octopus, I (not buy) wouldn't have bought it.

25 If they (hang)hung that picture lower, people would be able to see it.

26 She (be able)would be able to walk faster if her shoes hadn't such high heels.

27 I (bring)would have brought you some beer if I had known that you were thirsty.

28 If you had touched that electric cable, you (be)would have been elecrocuted.

29 If the story hadn't been true, the newspaper (not print)wouldn't have printed it.

30 I (not buy)wouldn't buy things on the instalment system if I were you.

31 Dial 999 if you (want)want Police, Ambulance or Fire Brigade.

32 You (not be)won't be any use to me unless you learn to type.

33 If anyone attacked me, my dog (jump)would jump at his throat.

34 If he were in, he (answer)would answer the phone.

35 The ship would have run around if the pilot (make)had made one mistake.

36 I shouldn't have taken your umbrella if I (know)had known that it was the only one you had.

1. find

2.will have

3.will happen

4.had had

5.will you stay

6.would you choose

7.gets

8.comes

9.will sit

10. didn't talk

11.will i do

12.had read

13.had

14.will go

15.would you do

16.run

17.won't be

18.comes

19.wouldn't have

20.had worn

21.leaves

22.will fall

23,don't change

24.wouldn't have bought

25.hung

26.would be able

27.would have brought

28.would have been

29.wouldn't have printed

30.wouldn't buy

31.buy

32.won't be

33.would jump

34.would answer

35.had made

36.had known

Choose the best answer for each of the following sentences.
1. In my experiments, the liquid is cooled to 32oF. It always freezes.
A. If you cool the liquid to 32 degrees, it froze.
B. If you cooled the liquid to 32 degrees, it would freeze.
C. If you cool the liquid to 32 degrees, it will freeze.
D. If you had cooled the liquid to 32 degrees, it would have frozen.

2. It may rain this afternoon. I hope it doesn't because I don't want the match to be cancelled.
A. If it rains, the match is cancelled.
B. If it rains, the match will be cancelled.
C. If it rained, the match would be cancelled.
D. If it had rained, the match would have been cancelled.

3. Unfortunately, I don't know Philosophy, so I can't answer your question.
A. If I know Philosophy, I can answer your question.
B. If I know Philosophy, I will be able to answer your question.
C. If I knew Philosophy, I would be able to answer your question.
D. If I had known Philosophy, I would have been able to answer your question.

4. ______ there are some more ideas, we can end the meeting now.
A. If
B. As if
C. Unless
D. In case

5. If he ______ with us now, he _____ the beauty of nature of the National Park.
A. is / can enjoy
B. was / will enjoy
C. has been / would enjoy
D. were / could enjoy

6. If they had searched more carefully, they _____ the watch sooner.
A. will find
B. would find
C. found
D. would have found

7. If I had got up early, I _______ to have breakfast now.
A. have
B. had
C. would have
D. would have had

8. I cannot buy a new computer ____ I save enough money.
A. if
B. even if
C. unless
D. as if

9. Most people you meet will be polite to you ______ .
A. if you are polite to them
B. if you will be polite to them
C. unless you are polite to them
D. if you were polite to them

10. If you do so, it _____ the matter worse.
A. makes only
B. would only make
C. will only make
D. had only made

11. You ______ English fluently unless you practice it every day.
A. will speak
B. will not speak
C. can speak
D. did not speak

12. Hurry up ______ you will miss the bus and be late for school.
A. if
B. and
C. or
D. as

13. You will get a good seat if you ______ first.
A. come
B. came
C. have come
D. will come

14. Sam will not graduate _______ .
A. if he passed all the tests
B. if he does not pass all the tests
C. unless he passes all the tests
D. unless he had passed all the tests

1. If you………..…time, Will you write to me?

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

2. I couldn’t go there at night if I…………..you.

A. am B. was C. be D. were

3. If I……….….get a pole, I will go fishing.

A. can B. could C. may D. might

4. If you had the chance, ………..….you go fishing?

A. did B. may C. would D. do

5. If you ………....a choice, which country would you visit?

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

6. If I were in your place, I………...a trip to England.

A. will make B. had made C. would make D. made

7. If you inherited a million pounds, what……….….with the money?

A. are you going to do B. will you do C. would you do D. do you do

8. If it………….… tomorrow, we may postpone going.

A. rains B. will rain C. shall rain D. raining

9. If I…….…, I will let you know .

A. am staying B. will stay C. do stay D. would stay