Lý thuyết và bài tập Câu điều kiện

Câu điều kiện
Type 1:	 có thể xảy ra trong tương lai:
Example :	 Tomorrow my mother will go Can Tho.
	If I have free time, I will go with her.
If - S – V (HTĐ )
S- will - Vo
Type 2: 	không thể xảy ra o hiện tại :
Example : 	- now he isn’t at home , I can’t tell him my problem .
if he were at home now , I could tell him my problem.
Now I have no money now I can’t help you .
If I had money now, I could help you.
 Be ( were )
If – S 
 V ( V 2ed )
 could
 S - would –v inf
 should
Type 3:
Example : Last night these wasn’t electricity, I didn’t see the film.
	If there had been electricity , I could have seen the film .
If – S - had-V 3 ed
 Could 
S - Would –have-v (ed-3)
 Should 
* Complete the following sentences, using conditional sentences.
If I had a good chance, I ( visit) all my friends:
If the wave weren’t so strong, I ( swim )
You ( feel ) better if you stopped smoking.
If we do something to preserve our environment, our life ( be ) better 
You will be very disappointed if you ( not pass ) the next exam .
 If I ( not drink ) strong tea last night, I ( have ) a sound sleep.
You ( enjoy ) many kinds of fruit if you ( go ) on holidays with us 
 Our life has many difficulties if we ( try ), we ( overcome ) them.
Tomorrow will be Sunday .You ( go ) out with me if you ( have ) nothing to do ?
The man refused to help us because he didn’t believe us .
 If the man ( believe ) us , he ( help ) us .
She will not tell the truth if you ( not give ) her a good chance to tell.
* Choose correct answer :
If the weather will not be able nice, if it is not nice, I  at home .
a. will be 	b. would be 	c. could be 	d. band c
The meeting will go on in time if all of us .. a ware of it .
a. will be 	b. would be 	c. are 	d. is 
I hope the weather will clear up. If the weather is good, I go for a walk.
a. will go 	b. would 	c. should 	d. could 
If nobody rings the police, he  get away with the money .
a. had 	b. would 	c. will 	d. could 
If the teacher hadn’t given us many exercises ,we ..them on time. 
a. had finished 	b. could have finished 	c. will have finished 	d. finished 
Yours truly, couldn’t buy a new car if you .. money .
a. didn’t save 	b. hadn’t saved 	c. don’t saved 	d. haven’t saved 
If we don’t try hard for this exam , we .. any chance .
a. couldn’t have 	b. shouldn’t have 	c. will not have 	didn’t have 
If you don’t Speak English well ,. In America.
a. can’t live 	b. couldn’t live 	c. will not live 	d. shouldn’t live
 If you want to have a flat in London , you . pay up to the nose.
a. have to 	b. will have to 	c. had to 	d. would have to 
If you . better last night , you would not have been tired now.
a. slept	b. had slept 	c. could sleep	d. can sleep
If my job gets low salary , I ..find another job.
a. will 	b. would 	c. could 	d. have to 
Roman . catch the train on time if the meeting ends sooner.
 a. will 	b. could 	c. would 	d. b & c 
We had to review all old lessons if we good marks.
a. need 	b. needed	c. had needed	d. will need
I am going to write you letters if I ..there soon.
a. come 	b. came 	c. will come 	d. can come
 Your reasons couldn’t be accepted, if you ..them clearly.
a. don’t explain 	b. can’t explain 	c. didn’t explain 	d. a and b 
If you don’t go to the station on time , you .. see her.
a. wouldn’t 	b. will not 	c. couldn’t 	d. can’t
If you don’t want mum to be angry , you .. obey her.
a. would 	b. will 	c. should 	d. can
John could row a boat if the weather so windy.
a. were 	b. is 	c. will be 	d. can be 
* Complete the following sentences :
Could you show them your ideas 
a. if they ask you 	b. if they asked you 
c. if they had asked 	d. a and b 
What will happen to our life.
a. If we could do smth to preserve it 	b. If we did nothing to preserve it
c. If we do nothing to preserve it d. If we had done something to preserve it
My brother could study abroad .
a. if my family got good crops 	b. if my family gets good crops
c. if my family can get good crops 	d. if my family had got good crops
If you don’t spend less , you 
a. won’t be able to buy a car	b. couldn’t be able to buy a car.
c. can buy a car 	d. have been able to buy a car
if the prices of foods get down this weekend ..
a. I would buy a new fridge 	b. I will buy a new fridge 
c. I can buy a new fridge 	d. I must buy a new fridge 
today if David plays for our team, we 
a. would win 	b. will win 	c. could win 	d. have win 
Good chance never comes to us if ..
a. we don’t work hard to have it 	b. we will not work hard to have it
c. we couldn’t work hard to have it	d. we didn’t work hard to have it 
I couldn’t possibly go there if my parents..
a. give me a little money 	b. gave me a little money
c. don’t give me money 	
If the life is the bed of roses
b. human has no sadness d. human has had no sadness
a. human will not has sadness
 10. If the way to your house is far, we.
 a. will go there by bus b. would go there by bus c. go there by bus
 11.She could have gone home if .
 a. she finished her work b. she had finished c. can finished 
 12. If I weren’t hurry, I 
 a. will concentrate properly 	 b. would concentrate properly	 c. concentrate properly
 13. If I pass all my exams brilliantly, I .
 a. would be delighted b. will be delighted c. had been delighted 
 14. If we miss the bus home after school,.
 a. I will walk b. I walked c. I would walk d. I had walked
 15. If I can do my homework this afternoon,.
 a. I asked you b. I will ask you c. I will have ask you 
 16. If my dream become true,.
 a. I will be a millionaire b. I would be a millionaire c. I am a millionaire
* Rewrite these sentences, using Conditional Sentences:
She is very shy; that’s why she doesn’t enjoy parties.
He is very unhealthy because he doesn’t take any exercise.
I didn’t see the signal, so I didn’t stop.
The only way that I can take you is my father lends me a car.
He doesn’t save enough to buy a computer but he’d like to
I’d like to go with you tonight but I am very busy.
She wasn’t able to answer the questions, so she failed the exam.
The reason why I didn’t phone you was that I didn’t know your phone number.
Without the sun, we wouldn’t exist.
Peter was very nervous and failed the driving test.
I can’t tell you what time it is because I don’t have a watch.
She didn’t learn mathematics; that’s why she was cheated by that salesman.
We missed the train because the clock wasn’t right.
The dress is very expensive, so she can’t buy it.
The teacher was very angry. His pupils did their homework carelessly
Use the correct tense of the verbs in brackets:
Your son wil be if he (eat) ___________ too much green fruit.
If dinner (not be)________________ ready, we’ll go without it.
You shouldn’t study hard if you (want)________________ to pass the final exam.
Unless he (ask)_____________ you, don’t give him anything.
What (happen)___________ if I press this button?
You could understand the lesson better if you (not talk)__________ in class so much.
I’ll go mad unless he (turn)_________ the radio off.
We (not have)_______________ to walk a long way if we hadn’t run out of petrol.
If the story (not be)______________ true, the newspaper wouldn’t have printed it.
 What_______you (do)_______ if you (be)_________ a millionaire?
Rewrite these sentences as directed:
He doesn’t eat fish when he isn’t extremely hungry.
à If____________________________________________________________
We didn’t hurry, so we were late for the concert.
à If____________________________________________________________
In order to get a driver’s license, you must be at least 18 years old.
à If you_________________________________________________________
A person must have a passport to be able to travel abroad.
à A person cannot travel abroad unless________________________________
Ann’s having a lot of trouble because she lost her passport last week.
à If_____________________________________________________________
Tom doesn’t do anything if you don’t tell him what to do.
à Unless_________________________________________________________
We must take steps to preserve natural resources, or the planet will be in danger.
à Unless__________________________________________________________
It’s such a pity your sister can’t come as well.
à If only__________________________________________________________
The soil would become poor unless the farmer added fertilizers.
à If ______________________________________________________________
You probably won’t have time, but I’d like you to come and see.
à If _______________________________________________________________
There were such a lot of traffic; that’s why we are late.
à Had______________________________________________________________
I couldn’t have managed it without your help.
à If_______________________________________________________________
It was her determination which enable her to get better so quickly.
à If__________________________________________________________________
He doesn’t get a job, so he can’t pay his bills.
à If_________________________________________________________________
She isn’t fit because she sits around too much.
à If__________________________________________________________________
The fire brigade came immediately, so the house didn’t burn down.
à If__________________________________________________________________
Sue walked to work in the rain and caught a cold.
àIf___________________________________________________________________
I was sick yesterday, so I didn’t go to class.
à If __________________________________________________________________
Because Alan never eats breakfast, he always overeats at lunch.
à If __________________________________________________________________
Peter didn’t finish unloading the truck because John didn’t help him.
à If___________________________________________________________________