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1、高中英语语法 高考二轮复习it考点讲义【精讲版】it用作形式主语特殊句式归纳总结it用作形式主语有不少非常有用的句式，比如以下一些就值得注意：1.用于it seems (appears) that句式。如：It seems that he knows everything.他好像什么都知道。It appears that we may be mistaken.看来我们可能弄错了。但是，英语一般不说it looks that，可改用it looks as if。如：It looks as if well be late.我们似乎要迟到了。2.用于it happens (occurs) that句

2、式。如：It happened that I was standing next to him when he collapsed.他倒下的时候我恰巧站在他旁边。It didnt occur to him that she would refuse his invitation.他没有想到她会拒绝他的邀请。3.用于it follows that句式。如：He is wrong, butit does not follow thatyou are right.他错了，但并不能由此推断你是对的。Shes not in the office but it doesnt necessarily fol

3、low that shes ill.她不在办公室,并不见得就是病了。哪些从句作主语时可用it作形式主语原则上说，it用作形式主语可以代替下列从句：1.that从句It is quite clear that he has read the book.很显然，他读过这本书。(HM)2.what从句It doesnt matter what he says.他说什么没关系。(HM)It was clear enough what he meant.他的意思是很明显的。3.who从句It hasnt been decided who will be sent to work there.还没决定将派

4、谁到那里工作。4.how从句It struck her how gentle he was being.她深深感到他多么温存。5.when从句It hasnt been made clear when the conference is to take place.会议什么时候召开还没有宣布。6.where从句Its not known where she went.她到哪里去了没人知道。It did not matter much where he lived.他在哪里住都没有关系。7.why从句It was clear why he had asked for a conference.他

5、为什么要求召开会议原因很清楚。8.whether从句It makes little difference whetherwe go or stay.我们去还是留没有多大差别。Its not yet settled whether I am going to America.我去不去美国还没定。it用作形式主语代替动名词主要用于哪些句式it用作形式主语代替动名词的用法主要见于以下句式：1.It is no use (no good, fun, great fun, a new experience, a great honour, etc) doing sth。如：It is no good t

6、alking.空谈是没有用的。Its fun working for him.为他工作很有意思。Its great fun sailing a boat.扬帆驾舟十分有趣。Its no use shouting at himhes deaf.向他叫喊是没有用的他耳聋。It has been a great honour your coming to visit us.你来看望我们是极大荣幸。2.It is good (nice, useless, interesting, pleasant, tiring, etc) doing sth。如：It is useless speaking.光说没

7、有用。It was pleasant sitting there.坐在那里很愉快。Its so nice sitting here with you.和你坐在一起真是愉快。Its good hearing English spoken.听到人讲英语，我很高兴。Its terribly tiring working late like this.这样干到深夜是非常累人的。3.it isworth while doing sth。如：Its worth while doing the work.这项工作值得做。Do you think its worth while quarrelling wit

8、h me?你认为和我吵值得吗?4.其他句式。如：It doesnt matterwasting a little money.浪费一点钱没有关系。It felt funny being dressed like a peasant girl.打扮成村姑感到有点怪怪的。Whats it like being married?结婚是什么味道。有关it的几道易错题1.Everyone knows that _ is dangerous to play with fire, but _ is difficult is to prevent children from playing with fire

9、.A. it, itB. what, whatC. it, whatD. what, it很容易误选B，认为两空均考查形式主语。最佳答案是C，第一空填形式主语，真正的主语是其后的不定式to play with fire。第二空填what，what is difficult是主语从句，注意what is difficult后的谓语动词is。请做以下类似试题：(1) I know _ is important to know my own limitations, but _ is difficult is to help others to know their own limitations.

10、A. it, itB. what, whatC. it, whatD. what, it(2) Yes, _ is difficult to find a job nowadays, but _ is more difficult is try to find such a job with a high salary but little things to do.A. it, itB. what, whatC. it, whatD. what, it2.I dislike _ when others laugh at me in public or think poorly of me b

11、ehind.A. thatB. thoseC. itD. them几个干扰项均有可能误选。最佳答案是C，因为在通常情况下，like是及物动词，其后应有宾语(句中it即为其宾语)。句中的when从句不是宾语从句，而是时间状语从句，其中的when的意思是“当的时候”。其实，也有的词典将I dont like it when (if) 作为一个句型来处理。能这样用的动词不多，主要的有enjoy, like, dislike, love, hate, prefer, appreciate等表示喜好的动词。She wont like it if you arrive late.她不喜欢你迟到。He ha

12、tes it when people use his bike.他讨厌别人用他的自行车。请做以下类似试题(答案均选it)：(1) I hate _ if people say such things in public.A. thatB. thoseC. itD. them(2) Id prefer _ if I didnt have to get up early on Sundays.A. thatB. suchC. itD. which(3) I would appreciate _ very much if you could give me some suggestions.A. t

13、hisB. thatC. itD. you3.Ive no idea. I just pretended nobody was at home, so I didnt ask who _ was.A. heB. thatC. sheD. it容易误选A或C。最佳答案是D。it用以指身份不明的人。若指身份明确的人，则不宜用it。比较：(1) Mr Smith is at the door. _ wants to see you.(2) Someone is at the door. _ must be Mr Smith.A. HeB. ItC. ThisD. That第(1)题选A，因为来者身份

14、明确；第(2)选B，因为来者身份不明确。4.Will you see to _ that my children are taken good care of while I am away?A. itB. meC. yourselfD. them几个干扰项均有可能误选。最佳答案是A。it为形式宾语，真正的宾语是空格后that引导的宾语从句。see to意为“负责”、“注意”，其中的to为介词，不宜直接跟that引导的宾语从句，遇此情况可借助代词it。请做下面两题，答案也是选it：(1) Ill see to _ that all these letters will be sent to t

15、he post before twelve.A. itB. meC. whichD. them(2) Will you see to _ that the luggage is brought back as soon as possible?A. meB. yourselfC. itD. them类似以上see to用法的短语还有depend on, answer for等。如下面两题答案也选it：(1) You may depend on _ that he will turn up in time.A. itB. meC. whichD. them(2) I cant answer for _ that the boy is honest.A. itB. meC. whichD. them学科网（北京）股份有限公司