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.carefulperson.It’s7:00It’slovely-Whatdoyouthinkofthemovie?-It’soneofthebestmoviesthatI’veseen.Who’sthelovelybaby?MyfatherisMr.Black.It’sMr.Black’s.Who’sknockingatthedoor?Itmightbethemilkman.一.代词1.人称代词a.用作人称代词，代替前文提到过的事物，以避免重复:b.也可以指动物或婴儿(未知性别的婴儿或孩子):c.指代未出场的身份不明确的人。2.非人称代词有时并不指具体的东西，可指天气、时间、距离、环境等3.指示代词指代this或thatThisisyourpen,isn’tit?What’sthatonthedesk?Iguessitmightbearobot.summaryTohavesuchamagichouseispleasant.It’spleasanttohavesuchamagichouse.Whetherwewillgototheoceanariumhasnotbeendecided.Ithasnotbeendecidedwhetherwewillgototheoceanarium.替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。二.it用作形式主语Itisillegal(forateenager)todriveacarwithoutalicense.It'skindofyoutohelpmewiththeproblem.1.Itbeadj.(forsb.)todosth.此处adj.通常为描述事件的形容词:easy,difficult,hard.Itbeadj.ofsb.todosth.此处adj.通常为描述人的形容词:kind,unkind,nice,rude,cruel,considerate.It’snogood/use/uselessdoing…It’sworthwhiledoing…It’sawasteoftimedoing…It’snousecryingoverspiltmilk.2.Itbe+adj./n.+doing…做…是…的Itissaid(reported/learned/believed/thought/known/told/hoped...)that...ItissaidthathehascometoBeijing.Itissaidthatheisagreatartist.Itissaidthatheisworkinginthatbigcompany.3.Itisv-edthat…=sb./sth.istodo其变式为:sb/sthis/wassaid/reportedtodobedoinghavedone例题1.Robertissaid____abroad,butIdon’tknowwhichcountryhestudiedin.A.tohavestudiedB.tostudyCtobestudyingD.tohavebeenstudying2.Robertissaid___inAfrica,butnooneknowshowsoonhewillbeback.A.travellingB.totravelC.tobetravellingDtravelled3.Yourcousinissaid___anewcomputerprogrammerecently,butdoyouknowwhenhewillfinishit?A.todesignB.tobedesigningC.tohavebeendesigningD.tohavedesigned4.Itis+noun/adj.+从句a.Itisapity(ashame/anhonor/afact/asurprise/...)that...b.Itisimportant(necessary，strange，natural...)that...Itisapitythatsuchathing(should)happeninyourclass.Itisapitythatheisill.c.Itisclear(obvious，true，possible，certain....)that.....Itisveryclearthathe’sroundandtalllikeatree.5.Ithappens(seems，looks，appears)that...Ithappened(sohappened)thathemethisteacherinthestreet.碰巧．．.Itseemsthathewillbebackinafewdays.看来．．．6.Ittakessb.sometimetodosth.Itwilltakeyou20minutestogettherebybus.___isexpected,accordingtosurvey,pricesofhouseswillnotgoupanylonger.A.ItB.ThisC.WhatD.As1.S+think+it+necessary+(forsb.)todosth.Thechairmanthought___necessarytoinviteProfessorSmithtospeakatthemeeting.(05全国)A.thatB.itC.thisD.himSentencepatterns:B…find…possiblefeel…important…/clause形式宾语2.S+V+it+one’sduty+(forsb.)todosth./clause3.S+V+it+nogood+doingsth.nouse/useless形式宾语Ithinkithisdutytocleantheblackboard.Sentencepatterns:…aruleanhonour………findpossible1.S+think+it+necessary+(forsb.)todosth./clausefeelimportant……Sentencepatterns:形式宾语…arule2.S+V+it+one’sduty+(forsb.)todosth./clauseanhonour…3.S+V+it+nogood+doingsth.nouse/useless三.作形式宾语(PreparatorySubject)为了记忆方便我们把该句型总结为6123结构。6指主句中常用的动词：think,believe,make,find,consider,feel；1指的是形式宾语it；2指的是宾补的两种形式：形容词或名词；3指的是真正宾语的三种形式：不定式短语，动名词短语或从句。Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.Ilike___intheautumnwhentheweatherisclearandbright.(04全国)A.thisB.thatC.itD.one点拨:这里的代词it指的是theweatherisclearandbright.少数动词(如like,love,enjoy,dislike,hate,appreciate等)或包含介词的动词短语(如seeto,dependon等)后接宾语从句,必须先由it担任形式宾语,再接从句.1.Ilike(enjoy,hate…)itwhen….2.Iwouldappreciateitif…3.seeto(depend/rely/counton…)itthat…Sentencepatterns:C四.It的常用句型Itistime(abouttime，hightime)that...是（正是）．．．的时侯孩子们该上床了。Itistimethatchildrenshouldgotobed.=Itistimethatchildrenwenttobed.It/That/Thisis/wasthefirst(second...)timethat...ItisthefirsttimeIhavebeenhere.Itbe+…+when...常译为“当．．．的时候，是．．．”Itwas5o’clockwhenhecamehere.Itbe+…+before...常译为“．．．之后．．．”。Itwas3daysbeforehewenttoBeijing.Itwillnotbelongbeforehefinisheshisjob.Itbe+…+since…Itis(hasbeen)5yearssincehisfatherdied.---It’salongtimesincewelast___.---Yes,it’sreallypityit’llbeanotherhalfayearbeforewe___again.A.met;metB.met;meetC.meet;willmeetD.meet;meet1.It’syears___(since,before,that)Ipaintedthisbeautifulpicture.2.Itwillbeyears___(since,before,that)Ipaintthisbeautifulpicture.3.Itwasyears___(since,before,that)Ipaintedthisbeautifulpicture.4.It’sforyears___(since,before,that)Ihavepaintedthisbeautifulpicture.易误辨析:______________________1.TheParkersboughtanewhousebut___willneedalotofworkbeforetheycanmovein.A.theyB.itC.oneD.which2.We’vebeenlookingathousesbuthaven’tfound___welikeyet.A.oneB.onesC.itD.them3.I’mmovingtothecountrysidebecausetheairthereismuchfresherthan___inthecity.A.onesB.oneC.thatD.those易误辨析:it/one/thatBACthehousethattheParkersboughtahousetheairDoyouwanttoliveanother100yearsormore?Someexpertssaythatscientificadvanceswillonedayenablehumanstolasttensofyearsbeyondwhatisnowseenasthenaturallimitofthehumanlifespan…Thereisagreatpushsothatpeoplecanlivefrom120to180years,”hesaid.“Somehavesuggestedthatthereisnolimitandthatpeoplecouldliveto200or300or500years.”However,manyscientistswhospecializeinageingaredoubtfulaboutit.(04全国D)Theunderlined“it”refersto____A.agreatpushB.theideaoflivingbeyondthepresentlifespanC.theideaoflivingfrom200to300yearsD.theconservativeestimateReadingcomprehension___wasmostimportanttoher,shetol