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2Strength&courageIt 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。适应环境需要

2、力量。与众不同需要勇气。与众不同需要勇气。感觉朋友的痛需要力量。感觉朋友的痛需要力量。感觉自己的痛需要勇气。感觉自己的痛需要勇气。隐藏自己的痛需要力量。隐藏自己的痛需要力量。展示自己的痛需要勇气。展示自己的痛需要勇气。生存需要力量。生存需要力量。生活需要勇气。生活需要勇气。It作形式主语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。3/22/2023It作形式主语1.It+be+形容词+主语从句ItisuncertainwhetherhecancometoJennysbirthdaypartyornot.3/22/2023It作形式主语

3、2.It+be+名词词组(+forsb.)+主语从句这类名词有：afact,apity,ashame,anhonor，aquestion等。Itsapitythatyoumissedtheexcitingfootballmatch.Itremainsaquestionwhetherhewillcomeornot.3/22/2023It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。Itisreportedthat16peoplewerekilledinthe

4、earthquake.Itisnotdecidedwhowillgivetheoperationtothepatient.3/22/2023It作形式主语4.It+不及物动词(seem,appear,happen,occur等)+主语从句Itseemedthathedidnttellthetruth.IthappenedthatIwasoutwhenhecalled.ItneveroccurredtomethatIwouldtraveltoAmerica.Itappearsthattheywontbeabletocomeatall.3/22/2023It作形式主语5.It+be+形容词+（fo

5、rsb.）+动词不定式常用形容词easy,difficult,hard,important,possible，wise等作表语Itsnecessaryfortheyoungtomastertwoforeignlanguages.Itisunwisetogivethechildrenwhatevertheywant.3/22/2023It作形式主语6.It+be+形容词+ofsb.+动词不定式形容词：kind,nicestupid,clever,foolish,polite,impolite,silly,selfish,considerate等Itsverykindofyoutohelpmewi

6、ththework.=Youarekindtohelpme.Itseemedselfishofhimnottosharehisdictionarywithothers.=Heseemedselfishnottosharehisdictionarywithothers.It作形式主语7.It+be+名词词组+动词不定式，如：Itisnotagoodhabittostayuptoolate.3/22/2023It作形式主语8.It+be+名词或形容词+动名词，名词和形容词：good,nogood,nouse,awasteof,useless,senseless,nohope,hopeless等It

7、sawasteoftimetalkingtoheranymore.Itisnousearguingaboutthematterwithhim.3/22/2023It作形式主语9.It+take(sb.)+时间（金钱）+动词不定式Ittooktheworkersalmostthreeyearstofinishbuildingthedam.Itwilltakeawholedaytogettothetopofthemountainonfoot.3/22/2023练习题1.Infact，isahardjobforthepolicetokeeporderinanimportantfootballmatc

8、h.A.thisB.thatC.thereD.it3/22/2023It+be+名词词组（名词词组（+for sb.）+动词不定式动词不定式D练习题2.Itisnevertoolatetolearn,_?A.isitB.isntitC.doesitD.doesntit3/22/2023BIt+be+形容词形容词+动词不定式动词不定式练习题3.isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It3/22/2023It+be+名词词组名词词组+主语从句主语从句D练习题4._willtak

9、eyoualotoftimetofindhiminthecrowd.A.ItB.IC.WeD.They3/22/2023It+take(sb.)+时间（金钱）时间（金钱）+动词不定式动词不定式A练习题1.(1)_isknowntousallisthatEnglishisausefullanguage.(2)_isknowntousall,Englishisausefullanguage.(3)_isknowntousallthatEnglishisausefullanguage.A.ItB.WhatC.ThatD.As3/22/2023BDAIt+be+过去分词过去分词+主语从句主语从句 练习

10、题2.(1)Itiskind_youtodoso.(2)Itiseasy_youtodoso.A.toB.forC.ofD.with3/22/2023CBIt+be+形容词形容词+for sb.+动词不定式动词不定式It+be+形容词形容词+of sb.+动词不定式动词不定式练习题3.(1)_isafactthatEnglishisbeingacceptedasaninternationallanguage.(2)_isnoneedforustodiscusstheproblemagainsinceithasalreadybeensettled.(3)_isunnecessaryforyout

11、oexplainittousanymore.A.ThisB.ThatC.ItD.There3/22/2023CDCIt+be+名词词组名词词组+主语从句主语从句It+be+形容词形容词+（for sb.）+动词不定式动词不定式以以It开头的句型开头的句型以it开头的句型1.it+特定动词+asif从句特定动词：appear,seem等。Itappearsasifyouareverytired.3/22/2023以it开头的句型2.ithasbeen/is+一段时间+since从句ItissixyearssinceIbegantoworkhere.IthasbeensixyearssinceIw

12、orkedhere.3/22/2023以it开头的句型3.it+be+一段时间+before从句Itwontbealongtimebeforewefinishcooking.Itwasfourdaysbeforetheyfoundthelostchild.3/22/2023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.3/

13、22/2023以it开头的句型5.itis/was+强调内容+that/who从句ItisinthestreetthatIcameacrossMr.Li.Itwasmyfriendwhopickedmeupatthestation.3/22/2023练习题1.(1)Itwaseightoclock_helefthere.(2)Itisateightoclock_hewillleavehere.(3)Itiseighthours_helefthere.(4)Itwillbeeighthours_wemeetagain.A.whenB.thatC.beforeD.since3/22/2023ABD

14、C练习题2.(1)Itsgood_youtotakeawalkaftersuppereveryday.(2)Itwasreallystupid_himtorefusetheinvitation.A.ofB.toC.forD.at3/22/2023CA练习题3.(1)WasitonNov.lst,_thefamousscientistwasborn?(2)WasitNov.1st,_thefamousscientistwasborn?A.inwhichB.onthatC.thatD.when3/22/2023CD练习题4.(1)Itisabouttendays_hereturnedhome.(2

15、)Itwastendaysago_helefthome.A.beforeB.thatC.sinceD.when3/22/2023CD练习题5.(1)ItwasnotuntilIhadreadyourletter_thetruth.(2)NotuntilIhadreadyourletter_thetruth.A.didIlearnB.IdidntlearnC.thatIlearnedD.thatIhadlearned3/22/2023CA 练习题3/22/2023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。Isitnecessarytotellhisfath

16、ereverything?Itsnogoodsittinguptoolate.Itisquiteclearthathehasreadthebook.Itdoesntmatterwhathesays.It作形式宾语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足语的情况3/22/2023It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Ifinditpleasanttoworkwithhim.Theyfeltitdifficulttofinishtheworkinsuchashorttim

17、e.Shethinksitherdutytohelpus.Ithinkitmyhonortobeinvitedtospeakhere.TomdidntfinditdifficulttowritelettersinChinese.Allthesenoisesmadeitimpossibleformetogoonwiththework.3/22/2023It作形式宾语it代替动名词短语Theprofessorconsidersitnogoodreadingwithoutunderstanding.Doyouconsideritanygoodtryingagain?Hefoundituseless(

18、nouse)arguingwithhim.Hethoughtitabsolutelysenselessattemptingtheimpossible.Idontthinkitworthwhilegoingtosuchaplace.3/22/2023It作形式宾语it代替宾语从句Weallthoughtitapitythattheconferenceshouldhavebeencancelled.Itookitforgrantedthattheywerenotcoming.Illseetoitthateverythingisreadyintime.3/22/2023练习题1.Idontthink

19、_possibletomasteraforeignlanguagewithoutmuchwork.A.thisB.thatC.itsD.it3/22/2023Dit代替不定式短语代替不定式短语 It作形式宾语没有宾语补足语的情况3/22/2023It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 wor

20、k.3/22/2023It作形式宾语2.动词+it+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.3/22/2023It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 finish

21、ed my work in time.Dont take it for granted that they will support you.3/22/2023It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.3/22/20235.动词+i

22、t+过去分词+从句。常见于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.3/22/2023It作形式宾语1.I would appreciate it_ you call back this afternoon for the doctors appointment.A.until B.if C.when D.that3/22/2023B练习题2.Wealltook_forgrantedthathewouldagreewithus.A.itB.himC.thatD.what3/22/2023AIt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.it3/22/2023D