it 作形式主语、形式宾语、it开头的短语课件

语法辅修刘爽Strength&courageIttakesstrengthtofitin.Ittakescouragetostandout.Ittakesstrengthtofeelafriend'spain.Ittakescouragetofeelyourownpain.Ittakesstrengthtohideyourownpain.Ittakescouragetoshowthem.Ittakesstrengthtosurvive.Ittakescouragetolive.适应环境需要力量。与众不同需要勇气。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。It作形式主语1.It+be+形容词+主语从句ItisuncertainwhetherhecancometoJenny’sbirthdaypartyornot.It作形式主语2.It+be+名词词组(+forsb.)+主语从句这类名词有：afact,apity,ashame,anhonor，aquestion等。It’sapitythatyoumissedtheexcitingfootballmatch.Itremainsaquestionwhetherhewillcomeornot.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。Itisreportedthat16peoplewerekilledintheearthquake.Itisnotdecidedwhowillgivetheoperationtothepatient.It作形式主语4.It+不及物动词(seem,appear,happen,occur等)+主语从句Itseemedthathedidn’ttellthetruth.IthappenedthatIwasoutwhenhecalled.It never occurred to me that I would travel to America.It appears that they won'tbe able to come atall.It作形式主语5.It+be+形容词+（forsb.）+动词不定式常用形容词easy,difficult,hard,important,possible，wise等作语It’snecessaryfortheyoungtomastertwoforeignlanguages.Itisunwisetogivethechildrenwhatevertheywant.It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It’sverykindofyoutohelpmewiththework.=Youarekindtohelpme.Itseemedselfishofhimnottosharehisdictionarywithothers.=Heseemedselfishnottosharehisdictionarywithothers.It作形式主语7.It+be+名词词组+动词不定式，如：Itisnotagoodhabittostayuptoolate.It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’sawasteoftimetalkingtoheranymore.Itisnousearguingaboutthematterwithhim.It作形式主语9.It+take(sb.)+时间（金钱）+动词不定式Ittooktheworkersalmostthreeyearstofinishbuildingthedam.Itwilltakeawholedaytogettothetopofthemountainonfoot.练习1.Infact，isahardjobforthepolicetokeeporderinanimportantfootballmatch.A.thisB.thatC.thereD.itIt+be+名词词组（+forsb.）+动词不定式D练习题2.Itisnevertoolatetolearn,________?A.isitB.isn’titC.doesitD.doesn’titBIt+be+形容词+动词不定式练习题isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.ItIt+be+名词词组+主语从句D练习题4.________willtakeyoualotoftimetofindhiminthecrowd.A.ItB.IC.WeD.TheyIt+take(sb.)+时间（金钱）+动词不定式A练习题1.(1)______isknowntousallisthatEnglishisausefullanguage.(2)______isknowntousall,Englishisausefullanguage.(3)_____isknowntousallthatEnglishisausefullanguage.A.ItB.WhatC.ThatD.AsBDAIt+be+过去分词+主语从句练习题2.(1)Itiskind_______________youtodoso.(2)Itiseasy_______________youtodoso.A.toB.forC.ofD.withCBIt+be+形容词+forsb.+动词不定式It+be+形容词+ofsb.+动词不定式练习题3.(1)_________isafactthatEnglishisbeingacceptedasaninternationallanguage.(2)_________isnoneedforustodiscusstheproblemagainsinceithasalreadybeensettled.(3)_________isunnecessaryforyoutoexplainittousanymore.A.ThisB.ThatC.ItD.ThereCDCIt+be+名词词组+主语从句It+be+形容词+（forsb.）+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+ as if从句特定动词：appear, seem等。 It appears as if you are very tired.以it开头的句型2.it has been/is +一段时间+ since从句It is six years since I began to work here.It has been six years since I worked here.以it开头的句型3.it +be+一段时间+ before从句 It won’t be a long time before we finish cooking.It was four days before they found the lost child.以it开头的句型4.it is (high) time + that从句=it is (high) time for sb. to do sth从句谓语要用一般过去时，也可用should doIt is high time that I went to see my mother in the hospital.It is time for you to do your homework.以it开头的句型5.it is/was +强调内容 + that/who从句It is in the street that I came across Mr. Li.It was my friend who picked me up at the station. 练习题1.(1)Itwaseighto’clock__________helefthere.(2)Itisateighto’clock__________hewillleavehere.(3)Itiseighthours__________helefthere.(4)Itwillbeeighthours__________wemeetagain.A.whenB.thatC.beforeD.sinceABDC练习题2.(1)It’sgood_______youtotakeawalkaftersuppereveryday.(2)Itwasreallystupid_______himtorefusetheinvitation.A.ofB.toC.forD.atCA练习题3.(1)WasitonNov.lst,__________thefamousscientistwasborn?(2)WasitNov.1st,_____________thefamousscientistwasborn?A.inwhichB.onthatC.thatD.whenCD练习题4.(1)Itisabouttendays__________hereturnedhome.(2)Itwastendaysago__________helefthome.A.beforeB.thatC.sinceD.whenCD练习题5.(1)ItwasnotuntilIhadreadyourletter________thetruth.(2)NotuntilIhadreadyourletter___________thetruth.A.didIlearnB.Ididn’tlearnC.thatIlearnedD.thatIhadlearnedCA练习题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。Isitnecessarytotellhisfathereverything?It’snogoodsittinguptoolate.Itisquiteclearthathehasreadthebook.Itdoesn’tmatterwhathesays.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足语的情况It作形式宾语⒈it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.Theyfeltitdifficulttofinishtheworkinsuchashorttime.Shethinksitherdutytohelpus.Ithinkitmyhonortobeinvitedtospeakhere.Tomdidn’tfinditdifficulttowritelettersinChinese.Allthesenoisesmadeitimpossibleformetogoonwiththework.It作形式宾语⒉it代替动名词短语Theprofessorconsidersitnogoodreadingwithoutunderstanding.Doyouconsideritanygoodtryingagain?Hefoundituseless(nouse)arguingwithhim.Hethoughtitabsolutelysenselessattemptingtheimpossible.Idon’tthinkitworthwhilegoingtosuchaplace.It作形式宾语⒊it代替宾语从句Weallthoughtitapitythattheconferenceshouldhavebeencancelled.Itookitforgrantedthattheywerenotcoming.I’llseetoitthateverythingisreadyintime.练习题1. I don't think_____ possible to master a foreign language without much work. A. this         B. that       C. its          D. it Dit代替不定式短语It作形式宾语没有宾语补足语的情况It作形式宾语1.动词＋it＋when/if从句常见动词appreciate,enjoy,like,dislike,love,hate,preferWewouldmuchappreciateitifyoucoulddousthatfavor.I'dpreferitifIdidn'thavetofinishthework.It作形式宾语2.动词+it+that从句。常见动词like,take,have,putItakeitthattheywillsucceedsoonerorlater.ThenewspapershaveitthatsomeJapanesefirmshavegonebankrupt.It作形式宾语3.动词+it+介词短语+that从句。常见短语bringittoone'sattention;oweittosb;takeitforgrantedIoweittoyouthatIfinishedmyworkintime.Don'ttakeitforgrantedthattheywillsupportyou.It作形式宾语4.动词+介词(短语)+it+that从句。常见介词answerfor,dependon,relyon,insiston,lookto,seeto,sticktoI'llseetoitthateverythingisreadyintime.YoumaydependonitthatTomwillhelpyouwithyourEnglish.5.动词+it+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。Ihearditsaidthatthatfactorywasfoundedin1995.Theyhaven'tmadeitknownwherethemeetingistotakeplace.It作形式宾语Iwouldappreciateit_____youcallbackthisafternoonforthedoctor‘sappointment.A.untilB.ifC.whenD.thatB练习题2.We all took _____ for granted that he would agree with us.A. it           B. him       C. that         D. whatAIt作形式宾语3.Whydon'tyoubring_____tohisattentionthatyouaretooilltogoonworking?A.thisB.youC.himD.itD