1.If he didn't have to study for his exam,he could go out.
2.If she weren't lazy,she could pass the same.
3.If he didn't smoke too much,he could get rid of his could.
4. If she had a college degree, she would be employed.
5. If she hadn't walked to the meeting, she wouldn't have been late.
6.If the weather hadn't been terrible, we wouldn't have put off our trip.
7.If you don't leto ave me alone, I will call the police.
8.Were you take good care of the car, it wouldn't break down so often.
9.If you tell lies to your boss, you will be fired at once.
10. Had he revised all his lessons, he wouldn't have failed the exam.
11. If the driver in front hadn't stopped so suddenly, the accident wouldn't have happened.