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 will 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 weren’t 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 exercises. He is so unhealthy

=> If he took some exercises, He would be healthy.

8) We can’t get the ticket because I don’t have the right change.

=> If I had the right chance, 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 are impatient, you will make mistakes.

If he hadn't to study for his exam he could go out

If she were not lazy she could pass the exam

If he pay me tonight, I will have enough money to buy a car.

If he didn't smoked too much, he could get rid of his cough.

If she were not very shy, she would enjoy the party.

If I don' t get a work permit.I wouldn't stay for another month.

If he doesn’t took exercises.He wouldn't be so unhealthy.

If I had the right change. We could get the ticket.

If you study hard,you would pass the exam.

If you are not impatient you wouldn't make mistakes.