1. If Mark hadn't prepared for exams all night, he wouldn't pass the exam yesterday.
2. If they went earlier, they would have already been there.
3. If my parents had an opportunity, they would buy a house near the sea.
4. If I was you, I wouldn't bother.
5. If Tom hadn't been so lazy, he would enter the university.
6. If you had gone to the party yesterday, I would introduce you to Den.
7. If the British hadn't conquered America a few decades ago, the English wouldn't be the native there.
8. If Mike had brought the money to us, we would buy the huge television.
9. If Don listened to his parents a year ago, his life would have changed.
10. If I took the camcorder in the summer, I would have taken good material.
11. If Simon went after 6 o'clock yesterday, we would have gone without him.
12. If you were smarter, you wouldn't have gotten a cold yesterday.
13. If you had gone to bed earlier yesterday, you would feel much better today.
