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1、精品名师归纳总结 It做形式宾语用法总结当不定式 （短语）、动名词 （短语） 或从句在某个句子中作宾语时,为保持句子结构平稳, 防止句式结构的纷乱,常用it作形式宾语,而将真正的宾语放在句尾,构成“动词it 宾语补足语不定式（动名词或从句）”结构,也可称作“6123结构”。此时it仍只起先行引导作用,本身无词义。它可以代替三种形式：不定式、动名词和宾语从句。it作形式宾语时,需具备两个条件： 真正的宾语是不定式、动名词或从句; 有宾语补足语,具备了这两个条件,形式宾语it肯定要用。 it代替不定式短语think/ find/ feel/ consider/ make/ regard+ it +
2、形容词/ 名词 +不定式短语如：I find it pleasant to work with him.it作形式宾语,代替不定式短语to work with himThey felt it difficult to finish the work in such a short time.（ it作形式宾语,代替不定式短语to finish the work in such a short time）She thinks it her duty to help us.（ it作形式宾语,代替不定式短语to help us）I think it my honor to be invited t
3、o speak here.（ it作形式宾语,代替不定式短语to be invited to speak here）Tom didn t find it difficult to write lettersin Chinese.（ it作形式宾语,代替不定式短语to write letters in Chinese）All these noises made it impossible for me to go on with the work.（ it作形式宾语,代替不定式短语to go on with the work） it代替动名词短语 这只限于少数句型,在多数情形下用不定式时更多一些
4、如：The professor considers it no good reading without understanding.可编辑资料 - - - 欢迎下载精品名师归纳总结Do you consider it any good trying againHe found it useless no use arguing with him.He thought it absolutely senseless attempting the impossible.I don t think it worthwhile going to such a place. it代替宾语从句： 如：W
5、e all thought it a pity that the conference should have been cancelled.I took it for granted that they were not coming.I ll see to it that everything is ready in time.“it ”的特别用法常显现在以下几种结构中。A. 动词 it when / if从句。常见于appreciate, enjoy, like, dislike, love, hate, prefer等少数动词之后。We would much appreciate it
6、 if you could do us that favour. Id prefer it if I didnt have to finish the work.B. 动词 + it+ that从句。常见于like,take,have, put 等少数动词之后（it相当于 that从句的同位语） 。I take it that they will succeed sooner or later.The newspapers have it that some Japanese firms have gone bankrupt. Rumor has it that Mary is getting
7、 married.I take it that you have been out.Let me come and stay. You can put it that it was arranged before.可编辑资料 - - - 欢迎下载精品名师归纳总结C. 动词 + it +介词短语 + that从句。常见于 bring it to ones attention; owe it to sb; take it for granted等结构中。I owe it to you that I finished my work in time. Dont take it for granted
8、 that they will support you.D. 动词 +介词 短语 + it+ that从句。常见于 answer for,depend on,relyon, insist on, look to, see to, stick to等结构中。Ill see to it that everything is ready in time.You may depend on it that Tom will help you with your English. I m counting on it that you will come.E. 动词 + it +过去分词 +从句。常见于
9、几个可以带过去分词作宾语补足语的动词之后。I heard it said that that factory was founded in 1995.They havent made it known where the meeting is to take place.易混用其他句型英语中有一些句型不含it,但却易被误用了 it ,常见的有以下句型： There is something/nothing wrong/ the matter with sb./ sth.如： There is nothing wrong /the matter with him. Hes just preten
10、ding.他没什么事,他只是在装了。There is no doubt about对毫不怀疑There is no doubt that对毫不怀疑可编辑资料 - - - 欢迎下载精品名师归纳总结如： There is no doubt about his suitability for the job.毫无疑问,他适合这个工作。 There is no doubt about the fact.关于这个事实毫无怀疑。 There is no doubt that he is hard to deal with.毫无置疑他很难应付。 There is no need for sb. to do
11、sth.没必要如： There was no need for him to remain in Paris.他没有必要连续留在巴黎。 There is no need for you to start yet.你现在仍不必动身。There is no/a possibility that 没可能/ 有可能= It is impossible/possible that如： There is a possibility that the train may be late.可能火车要晚点。There is no possibility that well see him this weeken
12、d.我们本周末不行能见到他。 There is a chance that可能如： There is a chance that the sick child will get well.这个生病的孩子可能会好起来的。 There be no/ some differences betweenand和之间没/ 有区分如： There are some differences between the two languages.这两种语言之间有些区分。 After what seemed +时间如：After what seemed a very long time, the wounded soldiercame back to life.在经过好像很长的一段时间之后,那个受伤的士兵清醒了过来。可编辑资料 - - - 欢迎下载精品名师归纳总结 There be difficulty/ trouble in doing sth.干有困难如： There was no difficulty in finding him.找到他没费什么事。可编辑资料 - - - 欢迎下载