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1、B6 U3 grammar it的用法,做形式主语 It 可以用作先行词作为句子的主语,而把句子的真正主语移到后面去, 可以移到后面的主语是： 不定式 句子的谓语可以是 be + 形容词；,e.g. It is important to know your limitations. 知道自己的局限性是很重要的。 be+名词； e.g. It is a good idea to have a little notebook handy. 手边有个小笔记本是个好主意。,be+介词短语； e.g. It is against the law to do that. 这样做是违法的。 其他类型的谓语
2、e.g. It gives me great pleasure to see the movie. 观看电影让我很高兴。,2) 动名词 用no good, no use, great fun, a new experience等名词作表语； e.g. It is fun working for him. 为他工作很有意思。,也可用某些形容词作表语； e.g. Do you think it is worthwhile quarrelling with him？ 你认为和他吵值得吗？ 一些其他的谓语形式。 e.g. Does it matter wasting a little money? 稍
3、微浪费一点钱行吗？,3) 主语从句 可以是that引导的； e.g. It is strange that it hasnt been noticed before. 真奇怪, 它以前没有引起注意。 It is a wonder that he is still alive. 他居然还活着, 真是个奇迹。,It happened that the harvest was bad that year. 碰巧, 那年的收成不好。 It is said that there has an earthquake in Japan. 据说日本发生了地震。,也可能是wh-词引导的 e.g. It is s
4、till a question how many people are to come. 多少个人会来, 还是个问题。 It is no business of yours where I spend my summer.我在哪儿过夏天, 这不关你的事。,It remains to be seen whether it will do us harm or good. 对我们有好处还是有害处, 还要等着瞧。 It was clear enough what he meant. 他的意思很清楚。,当复合宾语中的宾语是不定式、动名词、宾语从句时, 往往把宾语放在它的补足语后面, 而用it作形式宾语
5、, 放在宾语补足语之前。,e.g. I think it no use arguing with him. 我认为和他争吵没有用。,2. 作形式宾语。,I found it very interesting to study English. 我发现学英语非常有趣。 He made it clear that he was not interested in this subject. 他非常清楚地表示他对那门学科不感兴趣。,3. 用于强调结构 要强调句子的某一部分, 通常是主语、状语、宾语, 可以把it当作先行词。这种句子的结构是： “It is/was+被强调部分+that/who+句子的
6、其他部分”。如果强调的是人,可以用who, whom代替that。,e.g. It is Prof. Lin who teaches us English. (强调主语) It is English that Prof. Lin teaches us (强调宾语) It was in Shanghai that I saw the film. (强调状语) It was in 2001 that I went to university. (强调状语),e.g. The frog is not a warm-blood animal. Its a cold-blooded one.,4. 用作
7、人称代词,代替前文提到的事物。,5. 作为非人称代词,起指示代词的作用, 指一个人或事物。 e.g. Who is knocking at the door？ Its me. 2) 泛指天气。 e.g. Its a warm sunny afternoon.,3) 泛指时间 e.g. It was nearly midnight when she came back. 4) 泛指环境 e.g. It is noisy here. 5) 泛指距离 e.g. It is half an hours walk to the city center.,6. 用于某些习语 make it 及时赶到;成功
8、;办成 e.g. You can make it if you hurry. 如果你赶快还可以及时赶到。 You neednt worry; he will make it.你不必担心, 他会办到的。,catch it 被责骂; 受处罚 e.g. If I come home late, Ill catch it from my mother. 如果我回家晚了, 我妈妈会骂我。 Youll catch it because of your carelessness. 你会因为你的不小心受处罚的。,7. It的一些习惯用法 How is it with your study? 学习好吗？ Tha
9、ts it. 这就对了。 It went hard with him. 他身遇不幸。 It is all over with me. 我完蛋了。 We must fight it out. 我们必须坚持到底。 I cant help it. 我没有办法。,I. 单项选择 1. He didnt make _ clear when and where the meeting would be held. (天津) A. this B. that C. it D. these 2. _ is our belief that improvements in health care will lead
10、 to a stronger, more prosperous economy. (浙江) A. As B. ThatC. This D. It,高考实例,3. The doctor advised Vera strongly that she should take a holiday, but _ didnt help. (全国卷III) A. it B. she C. which D. he 4. Id appreciate _ if you would like to teach me how to use the computer. (山东) A. thatB. it C. this
11、 D. you,自测试题,1. it 2. it 3. it 4. it 5. it 6. it 7.neither 8. it 9.what it is 10.that,II (1) it; one; one (2) ones (3) that (4) those / the ones (5) that / the one,III 改错 1.You wont find difficult to get to the it 2.I know there is not easy to be a teacher. it 3.This is not surprising that the Silve
12、r Ghost It 4.The employment rate has continued to rise in big cities thanks to the efforts of the local governments to increase them. It,5.The cost of renting a house in central Xian is higher than it in any other area of the city. that 6.Id appreciate you if you could let me know in advance whether
13、 or not you will come. it 7.There is a fact that English is being accepted as an international language. It 8.And I came to understand that was not easy to darn money. it,9.I have no camera to lend to you, but my brother has it. one 10.When it got dark, the air was cooler than it in the daytime. tha
14、t,1.It (suddenly) occurred to him 2.It is reported 3.to turn it off 4. found it easier 5. It was estimated 6. It remains to be seen 7. has traveled 8. it came about 9. It was not until then 10.It has been proved/proven,巩固训练,had it occurred to him that,1. Never_ he was able to break the world record
15、but he did it.(occur) 他从来没想到他能够打破世界纪录，但是他做到,2. Scientists say it may be five or six years _test this medicine on human patients.(possible) 科学家说要五六年的他们才能把这种药在病人身上实验。,before it is possible,3. You _ this sort of accident wont take place again.(depend) 你可以相信这种事故不会再发生了。,can depend on it that,4. Parents s
16、hould teach children to _put away their toys after playing with them.(make) 父母应该教育孩子们把玩过玩具后收好定为一个规矩。 5. Look at such a mess in your essay! Now _ not having referred to abundant paper work.(use) 看看你的论文乱成一团糟，现在后悔没有大量查文献也没有用了。,make it a rule to,it is useless regretting,1.It was in Indonesia, the UN off
17、icials believe, _the tsunani caused the greatest damage. A. where B. which C. when D. that 2.It was in the factory _produced TV sets _ our friend was murdered. A. which, which B. that, which C. that, that D. where, that 3. It was last year _you taught me how to drive . A. when B. that C. where D . w
18、hich,C,B,A,4. It was for this reason _her uncle moved out of New York and settled down in a small village. A. which B. why C. that D. how 5. I cant quite remember _he began teaching in our school. A that, it was when B. when it was that C. when was it that D. that was it when,A,D,6. It is _who _wron
19、g. A. me, am B. me, is C. I , am D.I , is 7. It is _he often fails in exams _ makes his parents worried about him. A that, what B. because, that C. what, what D. that, that 8. It is you, rather than he ,that _for the accident. A. is to blame B. are to blame C. is to be blamed D. are to be blamed,B,C,C,19. -Where did you meet him? -It was in the park _ his wife and he first met. A. that B. where C. on which D. when 20. -He was nearly drown once. -When was _ -_ was in 1998 when he was in middle school. A. that; It B. this; This C. this; It D. that; This,A,A,