) 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 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................
10. Don't be impatient or you will make mistakes
=>If...............you are impatient , you will make mistakes.................