六、whether和if的区别 1）只用whether不用if的情况
引导位于句首的主语从句、表语从句、同位语从句时。 从句作discuss或介词的宾语时 紧跟or not时
在强调任意选择时,用whether?or
句子中有if引导的条件句，如再有表示“是否”的宾语从句，用whether不用if 2）如果宾语从句为否定句时，则只用if不用whether 用whether或if填空
1. I want to know you can come back. 2. It hasn’t been decided these foreign guests will visit our college. 3. We wondered that man was a spy or not. 4. I don’t know or not Tom has passed the examination. 5. it is true remains a question. 6. He asked me I’d move to New York if I got the job. 7. It depends on we will be ready in time. 8. He was thinking to go home or stay at the office. 9. I don’t know it won’t rain tomorrow.
10. Almost all people enjoy sports, boys or girls, men or women, young or old.
SUMMARY
Homework
一、语法填空：选用恰当的引导词填空
Everyone knew _______Andy was a famous writer, but no one knew _______shecame from and _______she was born in 1961 was still a mystery. _______they did know was _______she was loved by poor people because she always helped ______was in need of money. Andy was generous and helpful, but some people thought shewas chasing fame. Andy said she didn’t understand _______they were so narrow-minded, but it didn’t matter _______others would thought of her. She just wanted to do ________she thought was right. I think that is _______the meaning of life lies in.
二、用恰当的引导词填空
1. It’s up to you to decide you’ll go there, by air or by train. 2. He asked me told me the accident.
3. The reason why he failed is he was too careless. 4. I don’t believe the rumor he killed his daughter. 5. Is don’t know he will agree to the plan or not. 6. The fact she workshop hard is well known to us all. 7. Would you tell me the nearest post office is? 8. you ou don’t like him is none of my business. 9. This museum is not it was ten years ago.
10. She dresses well, but the trouble is the clothes she is wearing don’t go with each other very well.
11. You have no idea anxious I have been for her safety. 12. My radio doesn’t work. I don’t know the trouble is. 13. He doesn’t like them is very clear.
14. The old woman was shocked by had happened to her daughter. 15. Could you tell me for you have bought this fur coat? 16. Thomas Edison became a great inventor is known to all. 17. we’ll go camping tomorrow depends on the weather.
18. he felt sorry for was he wasn’t in time to prevent the accident. 19. It is not always easy for the public to see use a new invention can be of to human life.
20. It was never clear the man hadn’t reported the accident sooner. 21. I’m afraid he’s more of a talker than a doer, which is he never finishes anything.
22. Our teachers always tell use to believe in we do and whoever we are if we want to succeed.
23. We haven’t discussed yet we are going to place our new furniture. 24. I want to be liked and loved for I am inside.
25. Part of the reason Charles Dikens loved his own novel, David Copperfield, was
it was rather closely medeled on his own life.
26. As a new graduate, he doesn’t know it takes to start a business here. 27. One reason for her preference for city life is she can have easy access to places like shops and restaurants.
28. Cindy shut the door heavily and burst into tears. No one in the office knew she was so angry.
29. How much one enjoys himself travelling depends largely on he goes with, whether his friends or relatives.
30. To improve the quality of our products, we asked for suggestions had used the products.
31. We should consider the student’s request the school library provide more books on popular science.
32. The fact was worried many scientists the earth is becoming warmer and warmer these years.