Bài làm:
 1. He can’t go out because he has to study for his exam.
$\Rightarrow$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.
$\Rightarrow$If she weren't lazy, she could pass the exam.
 3. He will pay me tonight. I will have enough money to buy a car.
$\Rightarrow$If he didn.t pay me tonight, I wouldn;t have enough money to buy a car.
 4. He smokes too much; that’s why he can’t get rid of his cough.
$\Rightarrow$If he didn't smoke too much, he could get red of his cought.
 5. She is very shy, so she doesn’t enjoy the party.
$\Rightarrow$If she weren't very, she would enjoy the party.
 6. I will get a work permit. I will stay for another month.
$\Rightarrow$If I didn't get a work permit, I wouldn't stay for another month.
 7. He doesn’t take any exercises. He is so unhealthy.
$\Rightarrow$If he weren't so unhealthy, he would take some exercises.
 8. We can’t get the ticket because I don’t have the right change.
$\Rightarrow$If I had the right change, we could get the ticket
 9. Study hard or you won’t pass the exam.
$\Rightarrow$If you don't study hard, you won't pass the exam.
10. Don’t be impatient or you will make mistakes.
$\Rightarrow$If you are not impatient, you won't make mistakes.
* Tích điểm cho I nha. Chúc U Học Tốt *