Exercise 1: Rewrite the sentences using If clause 1. He can't go out because he has to study for his exam.  If ........................................................................................................................ 2. She is lazy so she can't pass the exam.  If ......................................................................................................................... 3. He smokes too much; that's why he can't get rid of his cough.  If ............................................................................................................................... 4. I can't play football this afternoon because I felt tired.  If ........................................................................................................................ 5. She can't be employed because she doesn't have a college degree.  If ......................................................................................................................... 6. Unless you promise to return back, I won't lend you.  If ......................................................................................................................... 7. We put off our trip because the weather was terrible.  If ................................................................................................................................ 8. If you do not like this one, I'll bring you another.  Unless ..................................................................................................................... 9. He will pay me tonight; I will have enough money to buy a car.  If ......................................................................................................................... 10. Leave me alone or I'll call the police.  If ................................................................................................................................