1. If he didn’t have to study for his exam, he could go out.
2. If you studied harder, you would get better marks
3. If she weren’t lazy, she could pass the exam
4. If she weren’t shy, she would enjoy the party.
5. If he pays me tonight, I will have enough money to buy a car
6. If you don’t study hard, you won’t pass the exam
9. If it doesn't rain, we will visit the beach this afternoon
10. unless you stay at your office, you will be punished.