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3. If we had a map, we wouldn't get lost.
4. If Mr. Mils were not late every day, he wouldn't lose his job.
5. If John didn't eat so many chips, he wouldn't be fat.
6. If I knew the answer, I could tell you.
7. Unless you work hard, you will fail the exam.
8. Unless you go out more often, you will fall in.
9. If he doesn't phone immediately, he won't get any information.
10. If we don't have enough money, we won't go on holiday.
11. If we had a map, we wouldn't get lost.
12. If I had known your number, I would have rung.
13. If she had known you were in hospital, she would have visited you.
14. If we had had time, we would have visited the museum.
15. If she didn't work in the evening, she would have had time to play with her children.
16. If she weren't often absent from class, she could keep pace with her classmates.
17. If it weren't very cold, we could go swimming.
18. If you make me some coffee, I'll give you one of my biscuits.
19. If you ask the teacher, he will explain the lesson to you.
20. If you don't work hard, you will fail the coming exams.
Câu đk loại 1 : If S Vs/es, S will (not) V
Câu đk loại 2 : If S V2/ed, S would/could (not) V
Câu đk loại 3 : If S had V3/ed, S would(not) have V3/ed
Unless = if not