1、It used as the Formal Object and Formal subject He found it difficult to stop smoking I think it best that you should do more exercise.She thought it no good worrying about himIt作形式宾语代替代替_、_、_。不定式不定式动词动词-ing短语短语从句从句1.It 用作形式宾语用作形式宾语 当当_、_、_在句子中作宾语时，在句子中作宾语时，为保持平衡，避免句式结构的混乱，常用为保持平衡，避免句式结构的混乱，常用it it作
2、形式宾语，而将真正的宾语放作形式宾语，而将真正的宾语放在句尾。此时在句尾。此时it it只起引导作用，无意义只起引导作用，无意义。S+vt+it+adj.n(for sb)to do sth.从句从句doing sth+We think it our duty to clean our classroom every day.He felt it no good learning English without speaking English.They found it difficult that they would finish their work in two days.不定式（短
3、语）不定式（短语）动名词（短语）动名词（短语）从句从句S+vt+it+adj.nS+vt+it+adj.n+S+vt+it+adj.n+S+vt+it+adj.n(for sb)to do sth.从句从句doing sth+S+vt+it+adj.n作形式宾语作形式宾语为了记忆方便我们把该句型总结为为了记忆方便我们把该句型总结为6123结构结构。6指主句中常用的动词：指主句中常用的动词：_；1指的是形式宾语指的是形式宾语:_；2指的是宾补的两种形式：指的是宾补的两种形式：_；3指的是真正宾语的三种形式：指的是真正宾语的三种形式：_ think believe make find consid
4、er feelit形容词或名词形容词或名词不定式短语，动名词不定式短语，动名词短语或从句短语或从句1.The fact that she was foreign made _difficult for her to get a job in that country.A.So B.much C.that D.it 2.The doctor thought _good for you to have a holiday.A.this B.that C.one D.It 3.I dont think _ possible to master a foreign language without m
5、uch memory work.A.this B.that C.its D.itIt 作形式宾语的特殊用法 1)某些表示“喜、怒、哀、乐”的动词，如_等后等后往往不能直接接宾语从句；必须先由必须先由it担任形式宾语担任形式宾语,再接从句再接从句.要是你们能帮我们这个忙，我们将非常感激。要是你们能帮我们这个忙，我们将非常感激。We would much _if you could do us that favor.要是我不必完成那项工作，那就太好要是我不必完成那项工作，那就太好了。了。Id _if I didnt have to finish the work.prefer,like,enjoy
6、,love,hate,dislike,appreciateappreciate itprefer it 2).某些含有介词的动词短语如某些含有介词的动词短语如_等结构中等结构中往往不能直接接宾语从句；必须先由必须先由it担任形式宾语担任形式宾语,再接从句再接从句.我将负责按时做好一切准备。我将负责按时做好一切准备。Ill see to _that everything is ready in time.你放心，汤姆会帮助你学英语的。你放心，汤姆会帮助你学英语的。You may depend on _.我指望着你会来。我指望着你会来。Im counting on it_.see to,depen
7、d on,count on,answer for,rely on,insist on,look to,stick toitit that Tom will help you with your English.that you will come.实战练习实战练习高考真题高考真题1.I like _ in the autumn when the weather is clear and bright.(MET2019)A.this B.that C.it D.one2.I hate _when people talk with their mouths full.(MET98)A.it B.t
8、hat C.these D.them3.I dont think _ possible to master a foreign language without much memory work.A.thisB.thatC.its D.it4.We consider _ a beautiful city to visit in autumn.A.that B.it C.this D.what完成句子（1）They _（发觉难）to finish their work in two days.（2）We _（认为是我们的职责）to clean our classroom every day.（3
9、）Her parents think it important _（对她来说）to come to the party.(4)I do not think it necessary _(答应他的朋友去野餐)found it difficultthink it our dutyfor her to promise his friend to go on a picnic.Translation1）我发现做好这件事不容易。_2）我认为你最好住这儿。_3）我们认为抱怨是没有用的。_4)我认为嘲笑别人是不礼貌的。_I find it difficult to do the job well.I thi
10、nk it best that you should stay here.We think it no use complaining.I think it not polite to laugh at others.It is amazing that at my age I am still fit.It is easy to become addicted to smoking.it is no good crying over spilt milk.(覆水难收)It 作形式主语作形式主语代替不定式、动词代替不定式、动词-ing短语、或从句。短语、或从句。Sentence pattern
11、:形式主语，顾名思义，即形式上是主语，但实际上不是真正的主语，真正的主语是后面的_、_或_等。为了避免句式上造成“头重脚轻”，句式不平衡，故往往用it作形式主语，而把真正的主语放在后面。it在这里没有任何意义。to doV-ingthat clause(for sb)to do sth.从句从句doing sth+It+is/wasadj.n Complement 1).It+be+形容词形容词+（for sb.）+动词不定动词不定式式这类句型常用形容词_等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，Its necessary for the young to mas
12、ter two foreign languages.easy,difficult,hard,important,possible，wise2).It+be+形容词形容词+of sb.+动词不定动词不定式，这类形容词常是表示式，这类形容词常是表示心理品质心理品质,性格特征的形容词，如：等。某人和这些形容词可以构成主系表结构。如：Its very kind of you to help me with the work.=You are kind to help me.kind,nice stupid,clever,foolish,polite,impolite,silly,selfish,con
13、siderateIt is _to learn Chinese.对于一个外国人来说，学习汉语是困难的。Its_ to learn English well.学好英语对我们来说是重要的。It was _to give up the job.他放弃那工作是愚蠢的。difficult for a foreignerimportant for usfoolish of himSection A.Choose the best choice.1.Is _ necessary to complete the design before National Day?A.this B.that C.it D.h
14、e2.Does _ matter if he cant finish the job on time?A.this B.that C.he D.it3.Toms mother kept telling him that he should work harder,but _ didnt help.A.he B.which C.she D.it4._ is a fact that English is being accepted as an international language.A.There B.This C.That D.It5._ happened _ he is unfit f
15、or the office.A.This;that B.That;that C.It;that D.He;that.Complete the sentences.1.对你来说，如果想获得成功，不要轻易放弃是很重要的。_ if you want to achieve success.2.我们中的一些人瞧不起残疾人是错误的。Its wrong that some of us _ the disabled.3.我认为嘲笑别人是不礼貌的。I think its _.impolite to laugh at othersIt is very important for you not to give u
16、p easilylook down upon.Translation 1.恰好那天我不在那里。_2.别给孩子太多的钱很重要。_3.我的职责就是扫地。_4.他每天花半个小时乘公共汽车上班。_ It takes him half an hour to go to work by bus.=It takes him half an hour to take the bus to work It happened that I wasnt there that dayIt is very important not to give children too much moneyIt is my dut
17、y to clean the floor.Section B1._ that the scientist will give us a talk next month?A.Is true B.Is it true C.Its true D.Its truly2._ doesnt matter much _ dress you are going to wear.A.This;that B.That;who C.It;which D.It;who3._ is going to America for further study.A.He is said that B.People said th
18、at heC.It was said he D.It is said that he4.They are good friends._ is no wonder that they know each other so well.A.This B.That C.There D.It5.Is _ possible to fly to the moon in a spaceship?A.this B.there C.that D.it.Complete the sentences.1.对我们来说，做好每一件事是很有必要的。Its very necessary _.2.对于年轻人来说学会团队精神很重
19、要。Its _to learn team spirit3.我忽然想起我知道怎样解决那个问题。It _ that I knew how to solve that problem.for us to do everything wellvery important for young peoplesuddenly occurred to me.Translation 1.说谎是错误的。_2.争吵是没用的。_3.真遗憾，他犯了这样一个错误。_4.大家都知道他是我们学校最好的教师之一。_It is wrong to tell a lie.It is no use arguing about it.It is a pity that she has made such a mistake.It is known that he is one of the best teachers in our school.
