Cau dieu kien (đầy đủ)

10. if: nếu
unless: nếu … không…, trừ phi:
Câu điều kiện loai 1: điễn tả sự kiện có thể xảy ra ở tương lai.
If
Clause,
Main clause


Simple present
Will/can/must/… + V





If the weather is fine, we will go for a picnic.
If the book is not expensive, I will buy it.
If it rains this afternoon, I will stay at home and watch TV.
If you want to attend this course, you must pass the test.
If she comes late again, she will lose her job.
If we pollute the water, we will have no fresh water to use.
If he does not hurry, he will miss the last train.
(Unless he hurries, he will miss the last train.
Câu điều kiện loai 2: điễn tả điều kiện không có thật hoặc trái ngược với thực tế .
If
Clause,
Main clause


Simple past
Would/could … + V





If I were you, I would buy that motorbike.( in fact I am not you.)
( Nếu tôi là anh, tôi sẽ mua chiếc xe máy đó.)
If I had a car, I could drive you everywhere. ( in fact I don’t have a car.)
If you saw a UFO, what would you do?
If you were on board now, you would experience those marvelous things.
What would you do if you met an alien from out space?
Câu điều kiện loai 3: điễn tả điều kiện không có thật hoặc trái ngược với thực tế quá khứ .
If
Clause,
Main clause


Past perfect tense
Would/could have + VpII




If he had come last night, he could have helped her son.
5. Or: hoặc là ( lựa chọn)/ or (else) : nếu không ( điều kiện)
Which is bigger: Ha Noi or Ho Chi Minh City?
Do you study English or French?
Hurry up or (else) we will be late for the bus.

Write sentences with “IF”
(cõu IF)
1. They drive carelessly. They get some problems.

2. We don’t have enough money, so we don’t buy those new comics.

3. She is not free today, so she can’t go to the movie with her friend.

4. He is so lazy. He fails in the final exam.

5. The weather is not fine. The children don’t play out doors.

6. She’s not interested in cooking. She doesn’t learn how to prepare a meal from her mother.

7. Thu cannot swim, so she doesn’t go to the swimming pool with her friend.

8. Lan has a lot of homework, so she doesn’t watch her favorite program on TV.

9. There is gravity, so people have weight.

10. It doesn’t snow, so we don’t go skiing.

11. Today isn’t New Year Day, so we don’t wear new clothes.

12. It’s not sunny today, so the farmer cannot dry their rice.

13. She doesn’t keep the refrigerator door closed, so she cannot save the energy.

14. The students miss the school bus so they are late for school.

15. She isn’t happy. She doesn’t get good marks.

16. The coffee is hot, so my mother can’t drink it.

17. Hoa doesn’t live with her parents. She misses them.

18. Phong isn’t tall enough to reach the top of the shelf.

19. Ba isn’t fast enough to catch the school bus.

20. Tam isn’t strong enough to lift that heavy box.

21. Thu doesn’t run fast enough. She doesn’t win the race.

22. These children don’t drink milk. They are not tall and healthy.

23. People use so much oil that there will be a shortage of oil in the future.

24. The girls are not skillful enough to make dresses for their dolls.

25. I don’t have an alarm clock, so I am late for school.


CONDITIONALS

Conditional Sentences: Type I

Put the verbs in brackets into the correct tenses.
1. If I see him I (give) him a lift.
2. The table will collapse if you (stand) on it