it作形式主语、形式宾语、it开头的短语.ppt

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1、语法辅修,刘爽,2,Strength&courage,It takes strength to fit in.It takes courage to stand out.It takes strength to feel a friends pain.It takes courage to feel your own pain.It takes strength to hide your own pain.It takes courage to show them.It takes strength to survive.It takes courage to live.,适应环境需要力量。与

2、众不同需要勇气。感觉朋友的痛需要力量。感觉自己的痛需要勇气。隐藏自己的痛需要力量。展示自己的痛需要勇气。生存需要力量。生活需要勇气。,It作形式主语,动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首。,7/6/2023,It作形式主语,1.It+be+形容词+主语从句It is uncertain whether he can come to Jennys birthday party or not.,7/6/2023,It作形式主语,2.It+be+名词词组(+for sb.)+主语从句这类名词有：a fact,a pity,a shame,an

3、honor，a question等。Its a pity that you missed the exciting football match.It remains a question whether he will come or not.,7/6/2023,It作形式主语,3.It+be+过去分词+主语从句这类过去分词有：announced,believed,expected,hoped,decided,reported,said,shown等。It is reported that 16 people were killed in the earthquake.It is not d

4、ecided who will give the operation to the patient.,7/6/2023,It 作形式主语,4.It+不及物动词(seem,appear,happen,occur 等)+主语从句It seemed that he didnt tell the truth.It happened that I was out when he called.ItneveroccurredtomethatIwouldtravelto America.Itappearsthattheywont beabletocomeat all.,7/6/2023,It 作形式主语,5

5、.It+be+形容词+（for sb.）+动词不定式 常用形容词easy,difficult,hard,important,possible，wise等作表语Its necessary for the young to master two foreign languages.It is unwise to give the children whatever they want.,7/6/2023,It 作形式主语,6.It+be+形容词+of sb.+动词不定式形容词：kind,nice stupid,clever,foolish,polite,impolite,silly,selfish

6、,considerate等Its very kind of you to help me with the work.=You are kind to help me.It seemed selfish of him not to share his dictionary with others.=He seemed selfish not to share his dictionary with others.,It 作形式主语,7.It+be+名词词组+动词不定式，如：It is not a good habit to stay up too late.,7/6/2023,It 作形式主语

7、,8.It+be+名词或形容词+动名词，名词和形容词：good,no good,no use,a waste of,useless,senseless,no hope,hopeless等Its a waste of time talking to her any more.It is no use arguing about the matter with him.,7/6/2023,It 作形式主语,9.It+take(sb.)+时间（金钱）+动词不定式It took the workers almost three years to finish building the dam.It w

8、ill take a whole day to get to the top of the mountain on foot.,7/6/2023,练习题,1.In fact，is a hard job for the police to keep order in an important football match.A.this B.that C.there D.it,7/6/2023,It+be+名词词组（+for sb.）+动词不定式,D,练习题,2.It is never too late to learn,_?A.is it B.isnt it C.does it D.doesnt

9、 it,7/6/2023,B,It+be+形容词+动词不定式,练习题,is a fact that English is being accepted as an international language.A.There B.This C.That D.It,7/6/2023,It+be+名词词组+主语从句,D,练习题,4._ will take you a lot of time to find him in the crowd.A.It B.I C.We D.They,7/6/2023,It+take(sb.)+时间（金钱）+动词不定式,A,练习题,1.(1)_ is known to

10、 us all is that English is a useful language.(2)_ is known to us all,English is a useful language.(3)_ is known to us all that English is a useful language.A.It B.What C.That D.As,7/6/2023,B,D,A,It+be+过去分词+主语从句,练习题,2.(1)It is kind _ you to do so.(2)It is easy _ you to do so.A.to B.for C.of D.with,7/

11、6/2023,C,B,It+be+形容词+for sb.+动词不定式,It+be+形容词+of sb.+动词不定式,练习题,3.(1)_ is a fact that English is being accepted as an international language.(2)_ is no need for us to discuss the problem again since it has already been settled.(3)_ is unnecessary for you to explain it to us any more.A.This B.That C.It

12、 D.There,7/6/2023,C,D,C,It+be+名词词组+主语从句,It+be+形容词+（for sb.）+动词不定式,以It开头的句型,以it开头的句型,1.it+特定动词+asif从句特定动词：appear,seem等。Itappearsasifyouareverytired.,7/6/2023,以it开头的句型,2.ithasbeen/is+一段时间+since从句ItissixyearssinceIbegantoworkhere.IthasbeensixyearssinceIworkedhere.,7/6/2023,以it开头的句型,3.it+be+一段时间+before从

13、句Itwontbealongtimebeforewefinishcooking.Itwasfourdaysbeforetheyfoundthelostchild.,7/6/2023,以it开头的句型,4.itis(high)time+that从句=itis(high)timeforsb.todosth从句谓语要用一般过去时，也可用shoulddoItishightimethatIwenttoseemymotherinthehospital.Itistimeforyoutodoyourhomework.,7/6/2023,以it开头的句型,5.itis/was+强调内容+that/who从句It

14、isinthestreetthatIcameacrossMr.Li.Itwasmyfriendwhopickedmeupatthestation.,7/6/2023,练习题,1.(1)It was eight oclock _ he left here.(2)It is at eight oclock _ he will leave here.(3)It is eight hours _ he left here.(4)It will be eight hours _ we meet again.A.when B.that C.before D.since,7/6/2023,A,B,D,C,练

15、习题,2.(1)Its good _ you to take a walk after supper every day.(2)It was really stupid _ him to refuse the invitation.A.of B.to C.for D.at,7/6/2023,C,A,练习题,3.(1)Was it on Nov.lst,_ the famous scientist was born?(2)Was it Nov.1st,_the famous scientist was born?A.in which B.on that C.that D.when,7/6/202

16、3,C,D,练习题,4.(1)It is about ten days _ he returned home.(2)It was ten days ago _ he left home.A.before B.that C.since D.when,7/6/2023,C,D,练习题,5.(1)It was not until I had read your letter _ the truth.(2)Not until I had read your letter _ the truth.A.did I learn B.I didnt learn C.that I learned D.that

17、I had learned,7/6/2023,C,A,练习题,7/6/2023,有必要把这一切都告诉他父亲吗?熬夜没有好处。很显然，他读过这本书。他说什么没关系。,Is it necessary to tell his father everything?,Its no good sitting up too late.,It is quite clear that he has read the book.,It doesnt matter what he says.,It作形式宾语,当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时，常用it作形式宾语.,It 作形式宾语,有宾语补

18、足语的情况,7/6/2023,It 作形式宾语,it代替不定式短语 表示“感觉”/“看待”的动词+it+形容词/名词+不定式短语 I find it pleasant to work with him.They felt it difficult to finish the work in such a short time.She thinks it her duty to help us.I think it my honor to be invited to speak here.Tom didnt find it difficult to write letters in Chines

19、e.All these noises made it impossible for me to go on with the work.,7/6/2023,It 作形式宾语,it代替动名词短语The professor considers it no good reading without understanding.Do you consider it any good trying again?He found it useless(no use)arguing with him.He thought it absolutely senseless attempting the impo

20、ssible.I dont think it worthwhile going to such a place.,7/6/2023,It作形式宾语,it代替宾语从句We all thought it a pity that the conference should have been cancelled.I took it for granted that they were not coming.Ill see to it that everything is ready in time.,7/6/2023,练习题,1.Idontthink_possibletomasteraforeign

21、languagewithoutmuchwork.A.thisB.thatC.itsD.it,7/6/2023,D,it代替不定式短语,It作形式宾语,没有宾语补足语的情况,7/6/2023,It 作形式宾语,1.动词itwhen/if 从句常见动词appreciate,enjoy,like,dislike,love,hate,preferWe would much appreciate it if you could do us that favor.Id prefer it if I didnt have to finish the work.,7/6/2023,It作形式宾语,2.动词+i

22、t+that从句。常见动词like,take,have,putI take it that they will succeed sooner or later.The newspapers have it that some Japanese firms have gone bankrupt.,7/6/2023,It作形式宾语,3.动词+it+介词短语+that从句。常见短语bring it to ones attention;owe it to sb;take it for granted I owe it to you that I finished my work in time.Don

23、t take it for granted that they will support you.,7/6/2023,It作形式宾语,4.动词+介词(短语)+it+that从句。常见介词answer for,depend on,rely on,insist on,look to,see to,stick to Ill see to it that everything is ready in time.You may depend on it that Tom will help you with your English.,7/6/2023,5.动词+it+过去分词+从句。常见于几个可以带过

24、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.,7/6/2023,It 作形式宾语,I would appreciate it_ you call back this afternoon for the doctors appointment.A.until B.if C.when D.that,7/6/2023,B,练习题,2.Wealltook_forgrantedthathewouldagreewithus.A.itB.himC.thatD.what,7/6/2023,A,It 作形式宾语,3.Why dont you bring _ to his attention that you are too ill to go on working?A.this B.you C.him D.it,7/6/2023,D,