What are conditionals in English grammar? Sometimes we call them 'if clauses'. They describe the result of something that might happen (in the present or future) or might have happened but didn't (in the past) . They are made using different English verb tenses. 

Bài tập 

Exercise 1. Tìm lỗi sai và sửa.

1. If there was a ban on cigarette, less people would smoke cigarette.

2. If the tax rate on junk food had increased, people would likely to prefer making food at home.

3. If schools administered with any teachers, disorder would arise.

4. If uncensored commercials had been banned, the crime rate would be seized from rising.

5. If computers replaced teachers in the classroom, learning would have been less effective.

Exercise 2. Chọn đáp án đúng.

1. If they had gone for a walk, they ……………………. the lights off.

A. had turned B. would have turn C. would turn D. would have turned

2. Would you mind if I ……………………. the window?

A. closed B. closing C. had closed D. would close

3. If you had tried your best, you ……………………. disappointed about the result now.

A. won’t be B. wouldn’t be C. wouldn’t have   D. wouldn’t have been

4. If I had enough money, ……………………..

A. I will buy that house.

B. I’d have bought that house.

C. I could buy that house.

D. I can buy that house.

Exercise 3. Chọn đáp án đúng.

1. ……………………., he would not have had the accident yesterday.

A. If Peter driven more carefully

B. If had Peter driven more carefully

C. Had Peter driven more carefully

D. If Peter not had driven more carefully

2. ……………………. I rich, I would help you.

A. Were     B. Was          C. Am          D. Been  

3.……………………. you run into Peter, tell him to call me.

A.  Are         B. Should           C. Been               D. Will

4. Had I known her, I……………………. friend with her.

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

Exercise 4. Chọn đáp án đúng.

1. I’ll help you if ……………………..

A. you told me the truth. B. you tell me the truth.

C. you will tell me the truth. D. you have told me the truth.

2. I have to work tomorrow morning, so I can’t meet you.

A. If I don’t have to work tomorrow morning, I can meet you.

B. If I didn’t have to work tomorrow morning, I could meet you.

C. I could meet you if I don’t have to work tomorrow morning.

D. I can meet you if I didn’t have to work tomorrow morning.

3. You drink too much coffee, that's why you can't sleep.

A. If you drank less coffee, you would be able to sleep.

B. You drink much coffee and you can sleep.

C. You wouldn’t sleep well if you hadn't drink any coffee.

D. You can sleep better without coffee.