4. If I hadn't felt tired, I could play football this afternoon.
5. If Olga and Ivan had been paying attention, they would have seen the sign marking their exit from the highway
6. If she had a college degree, she could be employed
7. If she hadn't walked to lớn the meeting, she wouldn't have been late
8. If you don't promise to lớn return back, I won't lend you
9. If the weather hadn't been terrible, we wouldn't have put off our trip
10. If Sally hadn't been absent from school on Friday, she would know what she has to lớn tự for homework
11. Unless you lượt thích this one, I'll bring you another
12. But for Martin's nerve, he wouldn't have failed the driving test last week
13. If he pays bu tonight, I will have enough money to lớn buy a car
14. If you don't leave bu alone, I'll Call the police
15. Should you arrive at the office earlier phàn nàn I tự, please turn on the air-conditioner
16. Had it not been for his early death, he would be a famous musician by now
17. Were I in your shoes, I would take good care of it
18. If you tell lies for your quấn, you'll be fired at once
19. If he had revised all his lessons, he wouldn't have failed the exam