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1、 IT 用法语法学案 It的用法（专项总结及训练） 一、人称代词 1，it的最基本用法是作代词，主要指刚提到的事物，以避免重复: They watched the train until it disappeared in the distance. 2.，也可以指动物或婴儿(未知性别的婴儿或孩子): Is this your dog？No, it isnt. They got a baby and it was a ten-pounder 3.，也可指抽象事物或指抽象环境和情景: I hate it when people talk with a full mouth. 二、.非人称代词 1
2、.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等： .指天气：It is a lovely day, isnt it? .指时间: It was nearly midnight when she came back. .指日期:It is April First today. .指距离:It is some 3000 kilometers from Beijing to Guangzhou. .指价值:It is three dollars. .指温度:Today it is 30 degrees centigrade. 四用作形式主语替代主语从句，动词不定式，
3、或动名词短语： 1).It 替代真正的主语动词不定式短语. It is easier to say than to do . It is a good act to help the others. 2).it 替代真正的主语动名词短语,以动名词短语做主语的句子，主要在以no good, no use, no harm, dangerous, foolish 等词作表语的句中. Its no harm drinking running water in that area。 Its foolish talking like that. 3).it 替代从句作主语，用从句做主语的带it 的句子很
4、多,常见的有下面几类： It is a pity (a shame ,a fact ,a wonder ,a good thing, etc. )that It is a shame that he didnt pass the exam. It is strange ( surprising, obvious ,true, good, possible, clear, etc. ) that 。 It was clear that they had no desire for peace. It seems (happened ,turned out, etc.)that It seemed
5、 that things were not as they expected. It is said ( decided ,expected ,etc)that It is said that the tickets have been sold out . 五、作形式宾语，代替不定式，动名词短语或宾语从句。 该句型中的it 作形式宾语，该结构中常用的动词有：think, believe, make ,find consider, feel； 如: We think it our duty to clean our classroom every day. He felt it importa
6、nt learning English well. They found it difficult that they would finish their work in two days. The Internet makes it easier for companies to keep in touch with customers. 六、.it的重要句型 1.强调句型: It is/was + 被强调部分 + that 从句 (被强调的主语如果是人，that可以由who换用) It was they that (who ) cleaned the classroom yesterda
7、y. It was in the street that I met her father. 特例:It is not until + 被强调部分 + that . 该句型也是强调句型。主要用于强凋时间状语，译成汉语直到才，可以说是 not . until . 的强调形式。 = Not until she took off her dark glasses did I realize she was a famous film star. = I didnt realize she was a famous film star until she took off her dark glass
8、es. 【精练精析】 1. _no need for us to discuss the problem again since it has already been settled. A. It has B. There has C. It is D. There is 2. Was it in 1969_the American astronaut succeeded_ landing on the moon? A. when; on B. that; on C. when; in D. that; in 3. Was_ that I saw last night at the conc
9、ert? 1 A. it you B. not you C. you D. that yourself 4. There is a photo on the wall. _ a photo of Marx. A. It B. Its C. Its D. Hes 5. The teacher kept telling him that he should work harder, but _didnt help .A. it B. he C. which D. she 6. Is _possible to fly to the moon in a spaceship? A. this B. ma
10、n C. that D. it 7. He felt_ his duty to help the poor. A. its B. its C. that D. it 8. It _Mike and Mary who helped the old man several days ago. A. was B. are C. were D. had been 9. How long_ to finish the work? A. youll take B. will take you C. youll take it D. will it take you 10.Many people now m
11、ake _a rule to buy cards for their friends before Christmas. A. themselves B. it C. that D. this 11. It was _I went there _I began to know something about the matter. A. until; when B. until; that C. not until; that D. not when; that 12. He said, “ _a long way to school. _a long way to go yet before
12、 we arrive.“ A. It is ; There is B. There is ; It is C. It is ; It is D. There is ; There is 13-Whos knocking at the door? - . A. Im John B. John is me C. John is the man D. Its John 14.I cant quite remember _you started doing the work. A. that it was when B. when it was that C. when was it that D.
13、that was it when 15. _certain that his invention will lead to the development of production. A. Thats B. This is C. Its D. Whats 16.It is important that she _with Mr Williams immediately. A. speak B. spoke C. will speak D. to speak 17._that theres another good harvest this year. A. It says B. It is
14、said C. It was said D. He was said 18.Its no use _ over spilt milk. A. cry B. crying C. that you cry D. for you to cry 19.Has _been decided when we are to hold the sports-meeting? A. that B. this C. it D. what 20.My home is in that tall building over there._ ? A. Can it see B. Can see it C. Can be seen it D. Can it be seen 【翻译】 1.在薄冰上行走是危险的。（形式主语+doing） _ 2.每天做早锻炼有益于身体健康。 （形式主语） _ 3,我们认为帮助灾区的人民抗风雪暴是我们的职责（形式宾语） _ 4.因为下雨的原因我们推迟了运动会。(强调句) _ 5这种事竟然发生在你们班上，真是遗憾！ (形式主语) _ 2 1-5.D D A B A 6-10 D D A D B 11-15.C A DB C 16-20.A.B BC D 1.Its dangerous walking on thin ice 2.Its good for us to do morni
