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 will pay me tonight; I will have enough money to buy a car.
---> If he pays me tonight, i would have enough money to buy a car
4. 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
5. She is very shy, so she doesn't enjoy the party.
--->if she were very shy, she would enjoy the party
6. I will get a work permit. I will stay for another month.
--->if I get a work permit, I will stay for another month
7. He doesn't take any exercise. He is so unhealthy.
--->if he took any exaecises, he were so healthy
8. We can't get the ticket because I don't have the right change.
--->if i had the right change, we could get the ticket
9. Study hard or you won't pass the exam.
--->if you don't study hard, you won't pass the exam
10. Don't be impatient or you will make mistakes.
--->if you aren't impatient, you will make mistakes