Bài tập câu điều kiện (Conditional sentences)

BÀI TẬP CÂU ĐIỀU KIỆN
(CONDITIONAL SENTENCES)
I/Put the verbs in brackets into the correct form:
If I see him , I _____ (give ) him a gift.
If I had a typewriter, I _____ (type) it myself. 
If I had known that you were in hospital, I _____ (visit) you.
You could make better progress if you _____ (attend) class regularly. 
If I _____ (know) his telephone number, I’d give it to you. 
If you _____ (arrive) ten minutes earlier, you would have got a seat. 
If he worked more slowly, he _____ (not make) so many mistakes.
I shouldn’t drink that wine if I _____ (be) you.
If I _____ (find) a cheap room, I will stay a fortnight.
A lot of people _____ (be) out of work if the factory closed down.
II/Make conditional sentences:
Keep silent or you’ll wake the baby up. →If ....
Stop talking or you won’t understand the lesson.→ If .......
I don’t know her number, so I don’t ring her up.→ If ........
I don’t know the answer, so I can’t tell you.→ If ...
We got lost because we didn’t have a map.→ If ....
Susan felt sick because she ate four cream cakes. →..
Without this treatment, the patient would have died. →.....
He lost his job because he was late every day. →...
Peter is fat because he eats so many chips. →.....
Robert got a bad cough because he started smoking cigarettes. →....
III/ 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
If you do not like this one, I’ll bring you another 
Unless 
If she does not hurry, she’ll be late 
Unless .
If you are not careful, you’ll cut yourself 
Unless 
if you had not sneezed, he wouldn’t have known that we were there.
Unless  	 
IV/ One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them.
If Lucia had been here now, she would find out the truth about her uncle’s accident.
 A B C D
If a student takes a course on Computer Science, it will take him four years doing the course.
 A B C D
Unless it did not rain, Peter would pay us a visit.
 A B C D
If had I known you were in financial difficulty, I would have helped you.
 A B C D
If I had knew the time when the match started, I would have told you.
 A B C D
If she had finished the work, she can go home.
 A B C D
If I had spoken more confident at the interview, they would have offered me the job.
 A B C D
If we had had a map, we would not be lost yesterday.
 A B C D
Had I known Alice’s address, I would write to her.
 A B C D
V/ Choose the best answer for each of the following sentences.
_____have enough apples, she’ll make an apple pie this afternoon.
A.Should she	B. If she	C. Will she	D. Unless she
If you_____to me, you wouldn’t have got so much trouble.
A. listened	B. would listen	C. had listened	D. Would have listened
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
If the sun _____, we _____for a walk.
A. shines / will go	B. shone / will go	C. shone / would go	D. had shone / would go
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
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
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
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
If we _____ the plans carefully, we would not have had so many serious mistakes.
A. study	B. had studied	C. studied	D. were studying
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
He stepped on the mine, and it exploded.
If he doesn’t step on the mine, it doesn’t explode.
If he doesn’t step on the mine, it won’t explode.
If he didn’t step on the mine, it wouldn’t explode.
If he hadn’t stepped on the mine, it wouldn’t have exploded.
In my experiments, the liquid is cooled to 32ºF. It always freezes.
If you cool the liquid to 32 degrees, it froze.
If you cooled the liquid to 32 degrees, it would freeze.
If you cool the liquid to 32 degrees, it will freeze.
If you had cooled the liquid to 32 degrees, it would have frozen.
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.
Unfortunately, I don’t know Philosophy, so I can’t answer your question.
If I know Philosophy, I can answer your question.
If I know Philosophy, I will be able to answer your question.
If I knew Philosophy, I would be able to answer your question.
If I had known Philosophy, I would have been able to answer your question.
IV/Choose the best answer:
If I .a lot of money now, I ..a new car.
A. have /will buy	B. have / would buy	C. had/ will buy	D. had/ would buy.
If I you, I .do that.
A. am/ will	B. were /would	C. were/ will	D. had been/ would.
if I were offered the job, I think I . it.
A. take	B. will take	C. would take	D. would have taken.
I would be very surprised if he..
A. refuses	B. refused	C. had refused	D. would refuse.
Many people would be out of work if that factory..down.
A. closes	B. had closed	C. closed	D. would close.
If she sold her car, she  much money.
A. gets	b. would get	c. will get	d. would have got.
They would be disappointed if we.
a. hadn’t come	b. wouldn’t come	c. don’t come	d. didn’t come.
Would John be angry if I . his bicycle without asking?
a. take	b. took	c. had taken	d. would take.
She .terrible upset if I lost this ring.
a. will be 	b. would be	c. were	d. had been.
If someonein here with a gun, I would be very frightened.
a. would walk	b. walks	c. had walked	d. walked.
What would happen if you ..to work tomorrow?
a. don’t go	b. didn’t go	c. won’t go	d. wouldn’t go.
V/Rewrite the following sentences:
He can’t go out because he has to study for his exam.
=> If..
She is lazy so she can’t pass the exam.
If
He will pay me tonight; I will have enough money to buy a car.
=> If.
He smokes too much; that’s why he can’t get rid of his cough.
=> If..
She is very shy, so she doesn’t enjoy the party.
=> If..
I will get a work permit. I will stay for another month.
=> If..
He doesn’t take any exercises. He is so unhealthy
=> If.
We can’t get the ticket because I don’t have the right change.
=> If..
Study hard or you won’t pass the exam.
=> If..
Don’t be impatient or you will make mistakes.
=> If..
I didn’t eat lunch, I feel hungry now.
=> If I...
I only come if they invite me.
=> unless.	
The car breaks down so often because you don’t take good care of it.
=> Were I	
He is very bad-tempered, that’s why his wife left him soon after marriage.
=> If he
Don’t tell lies to your boss or you’ll be fired at once.
=> If
She got married at such an early age: otherwise, she would be at university now.
=> Had .	- 3 -
VI/ Rewrite the following sentences
We can’t go out because he has to study for his exam. => If ..
She is lazy so she can’t pass the exam. => If
He will pay me tonight; I will have enough money to buy a car. => If 
He smokes too much; that’s why he can’t get rid of his cough. => If..
She is very shy, so she doesn’t enjoy the party. => If .
He doesn’t take any exercises. He is so unhealthy => If .
Study hard or you won’t pass the exam. => If ..
Don’t be impatient or you will make mistakes. => If .
I didn’t eat lunch, I feel hungry now. => If I...
If you want my advice, I wouldn’t buy it => If I  .
Exercise 12: One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them.
1. If we will reduce the speed of population growth, there will be less pressure on the earth.
2. Unless we leave a bowl of water under the sun, it will evaporate.
3. If we continue to use fuels at the current rate, we would soon have to face a fuel crisis.
4. If I am 10 centimeters taller, I would play basketball.
5. If the doctors could find in the remedy, a lot of people would be saved.
6. If she bought that house now, she ran out of money.
7. What you would do if you could speak French well?
8. If I had known he is not at home, I wouldn’t have gone all the way to his house.
9. If I had known that the road were flooded, I would never have taken that way.
10. If I were you, I will go to the dentist’s and have the tooth checked.
Exercise 13: Gạch chân dưới đáp án đúng:
1) If that hat costs much, I (would have bought/will buy/bought/would buy) a small one.
2) If you (drive/drove/had driven/driven) more carefully, you wouldn’t have had so many accidents.
3) If I (make/makes/made/had made) that mistake again, my teacher will get angry with me. 
4) If I spoke English, my job (was/were/will be/would be) a lot easier.
5) If he (goes/went/had gone/would go) to London yesterday, he (met/would meet/had met/would have met) his old friend.
6) I will lend them some money if they (ask/will ask/asked/had asked) me.
7) If we had known who he was, we (would have invited/have invited/will invite/would invite) him to speak at our meeting. 
8) My dog will bark if it (hear/hears/heard/had heard) any strange sound.
9) If I (had/had had/will have/have) enough money, I would buy a house.
10) They (won’t let/not let/wouldn’t let/hadn’t let) you in if you come late.