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 wasn't lazy, she could pass the exam.........

3. H will pay me tonight; I will have enough money to buy a car.

=> If ....H doesn't pay me tonight, I won't 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 don't get a work permit,I won't stay for another month....

7. He doesn't take any exercises. He is so unhealthy.

=> If ..........he took any exercises,he wouldn't be so unhealthy.........

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................