1 If he didn't have to study for his exam , he could go out
2 I she weren't lazy,she could pass the exam.
3 If he didn't smoke too much,he could get rid of his cough.
4 If I hadn't felt tired,I could play football this afternoon
5 If had a college degree,she could be employed
6 If you don't promise to return back, I won't lend you.
7 If the weather hadn't been terrible , we could put our trip
8 Unless you like this one, I'll bring you another.
9 If he pays me tonight, I will have enough money to buy a car.
10 If you leave me alone , I'll not call the police.