Question

Exercise 1: Kết hợp câu dùng câu điều kiện
1. He can't go out because he has to study for his exam.
 If ................................................................................................................................................................
2. She is lazy so she can't pass the exam.
 If .................................................................................................................................................................
3. He smokes too much; that's why he can't get rid of his  cough.
 If ................................................................................................................................................................
4. I can't play football this afternoon because I felt tired.
 If .................................................................................................................................................................
5. Olga and Ivan weren't paying attention, so they didn't see the sign marking their exit from the  highway.
 If .................................................................................................................................................................
6. She can't be employed because she doesn't have a college degree.
 If .................................................................................................................................................................
7. She walked to the meeting. She was late.
 If ................................................................................................................................................................
8. Unless you promise to return back, I won't lend you.
 If ................................................................................................................................................................
9. We put off our trip because the weather was terrible.
 If ................................................................................................................................................................
10. Sally doesn't know what she has to do for homework because she was absent from school on  Friday.
 If .................................................................................................................................................................
11. If you do not like this one, I'll bring you another.
 Unless .........................................................................................................................................................
12. Martin failed his driving test last week because he was very  nervous.
 But for.........................................................................................................................................................
13. He will pay me tonight; I will have enough money to buy a car.
 If ................................................................................................................................................................
14. Leave me alone or I'll call the police.
 If ................................................................................................................................................................
15. If you arrive at the office earlier than I do, please turn on the air-conditioner.
 Should.........................................................................................................................................................
16. He died so young; otherwise, he would be a famous musician by now.
 Had it ..........................................................................................................................................................
17. The car breaks down so often because you don't take good care of it.
 Were you ...................................................................................................................................................
18. Don’t tell lies to your boss or you'll be fired at once.
 If .................................................................................................................................................................
19. He didn't revise all his lessons, so he failed the exam. 
 Had ...........................................................................................................................................................
20. Rita is exhausted today because she didn't get any sleep last night.
 If .................................................................................................................................................................

Answer 1

Exercise 1: Kết hợp câu dùng câu điều kiện
1. He can't go out because he has to study for his exam.
 If he didn't have to study for his exam, he could go out.
2. She is lazy so she can't pass the exam.
 If she weren't lazy, she could pass the exam.
3. He smokes too much; that's why he can't get rid of his  cough.
 If he didn't smoke too much, he could get rid of his cough.
4. I can't play football this afternoon because I felt tired.
 If I hadn't felt tired, I could play football this afternoon.
5. Olga and Ivan weren't paying attention, so they didn't see the sign marking their exit from the  highway.
 If Olga and Ivan had been paying attention, they would have seen the sign marking their exit from the highway.
6. She can't be employed because she doesn't have a college degree.
 If she had a college degree, she could be employed.
7. She walked to the meeting. She was late.
 If she hadn't walked to the meeting, she wouldn't have been late.
8. Unless you promise to return back, I won't lend you.
 If you don't promise to return back, I won't lend you.
9. We put off our trip because the weather was terrible.
 If the weather weren't terrible, we wouldn't have put off our trip.
10. Sally doesn't know what she has to do for homework because she was absent from school on  Friday.
 If Sally hadn't been absent from school on Friday, she would know what she has to do for homework.
11. If you do not like this one, I'll bring you another.
 Unless you like this one, I'll bring you another.
12. Martin failed his driving test last week because he was very  nervous.
 But for Martin's nervousness, he wouldn't have failed his driving test.
13. He will pay me tonight; I will have enough money to buy a car.
 If he pays me tonight, I will have enough money to buy a car.
14. Leave me alone or I'll call the police.
 If you don't leave me alone, I'll call the police.
15. If you arrive at the office earlier than I do, please turn on the air-conditioner.
 Should you arrive at the office earlier than I do, please turn on the air-conditioner.
16. He died so young; otherwise, he would be a famous musician by now.
 Had it not been for his young death, he would be a famous musician by now.
17. The car breaks down so often because you don't take good care of it.
 Were you to take good care of the car, it wouldn't break down so often.
18. Don’t tell lies to your boss or you'll be fired at once.
 If you tell lies to your boss, you'll be fired at once.
19. He didn't revise all his lessons, so he failed the exam. 
 Had he revised all his lessons, he wouldn't have failed the exam.
20. Rita is exhausted today because she didn't get any sleep last night.
 If Rita had got some sleep last night, she wouldn't be exhausted today.