语法专题十：it的用法.doc

省镇中高三英语二轮复习语法专题
语法专题十：it的用法
1. 指代事物、动物、婴儿或未知的人。
2. 指天气、时间、距离、自然现象、环境等。
3. 代替不定式，作形式主语或形式宾语(常与feel, consider, find, believe, make, take, imagine, think, suppose, regard等连用)。
4. 代替动名词，作形式主语或形式宾语：
It is no good / no use / useless / dangerous + doing
I think it no good / no use / useless / dangerous + doing
I think it no use complaining about their prejudice.
5. 代替主语从句、宾语从句，作形式主语或形式宾语：
It seems / appears / happens / turns out / proves + that…
It is certain / likely / possible / probable + that…
We have made it clear that she has nothing to do with the case.
6. 用于强调句：It is / was … that / who…
A student witnessed the car accident at the turning last night.
(1 ) ( 2 ) ( 3 ) ( 4 )
(1) _________________________________________________________.
(2) _________________________________________________________.
(3) _________________________________________________________.
(4) _________________________________________________________.
It is not until +被强调的部分+ that…
I didn’t realize she was a famous film star until she took off her dark glasses.
________________________________________________________________.
7. 其他重要句型：
It is important (necessary, right, strange, natural) that…（should+动词原形）
It is said (reported, learned…) that…
It is suggested (ordered…) that…（should）+动词原形
It is a pity (a sham) that …（should）+动词原形
It happens (seems, looks, appears ) that...
It occurs to sb. to do / that…：使某人想起……
It is/ has been +一段时间 + since ...+过去时
It will be +一段时间+ before ...
It looks ( seems ) as if …
It is no wonder…：难怪
When it comes to…：当谈到……
It comes about that…：发生
8. appreciate, love, like, hate, see to(负责，注意) + it + 从句
巩固练习：
1. It took us over an hour ______ along the street.
　A. walk B. to walk C. walking D. walked 
2. I think it a great honour ______to visit your country.
　A. to invite B. inviting C. having invited D. to be invited 
3. Many people now make ______a rule to buy cards for their friends before Christmas.
　A. themselves B. it C. that D. this 
4.　______is very clear to everyone that he's round and tall like a tree.
　 A. This  B. What C. That D. It 
5. ---It is raining cats and dogs.
---______ .
　A. So it is B. So is it C. Neither it is D. Neither is it 
6. It's no use ______over spilt milk.
　A. cry B. crying C. that you cry D. for you to cry  
7. It is important ______ their offer.
　A. reject B. rejects C. to reject D. rejecting 
8. Has ______been decided when we are to hold the sports-meeting?
　A. that B. this C. it D. what 
9. ---Did Li Lei call me while I was out?
　---Yes, it was ______ that called you.
　A. him B. he C. who  D. whom 
10. I don't know ______makes her afraid of having her business discussed.
　 A. what it is about Mary that B. that is it abut Mary what
C. what is it about Mary that D. that is about Mary what 
11. It was with great joy ______ he received the news that his long lost son would return home.
　 A. as B. that C. so D. for　
12. I don't think ______difficult for a  student to master a foreign language within five years.
　 A. that B. it C. too D. very 
13. It's the second time you ______ late this week.
　 A. arrive B .arrived C. have arrived D. had arrived 
14. It will not be ______we meet again.
　 A. long before B. before long C. soon after D. shortly after 
15. It's demanded that we ______there on foot.
　 A. not to go B. don't go C. not go D. won't go 
16. It was not until 1936 ______ basketball became a regular part of the Olympic Games.
　 A. that B. when C. which D. then 
17. ______ you met the Englishman?
　 A. Where it was that　 B. Who it was that C. Where was it that　　 D. Where was that 
18. ______ certain that his invention will lead to the development of production.
　 A. That's B. This is C. It's D. What's 
19. Tom's mother kept telling him that he should work harder, but ______didn't help.
A. he B. which C. she D. it
20. It is important that she ______with Mr. Williams immediately.
　 A. speak B. spoke C. will speak D. to speak 
21. ______that there’s another good harvest this year.
　 A. It says B. It is said C. It was said D. He was said 
22. I really appreciate ______ if you can lend your computer.
A. that B. what C. it D. which
23. I didn’t ______ her ______ for help.
A. occur; to ask B. occur to; to ask C. occur to; asking D. happen to; that to ask
2