it的用法

it的用法一、it作人称代词1.it的最基本用法是作代词，主要指______________，以避免重复.刚提到的事物TheParkersboughtanewhousebut___willneedalotofworkbeforetheycanmovein.A.theyB.itC.oneD.whichB2.也可以指动物或婴儿(未知性别的婴儿或孩子)3.也可指抽象事物Howisitgoing?近况如何？---Doyoulike____here?---Oh,yes.Theair,theweather,thewayoflife.Everythingissonice.AtheseBthisCitDthatC区别：one(ones/theone/theones)/it/that(those)one表示泛指，指代单数可数名词，与指代的名词同类。ones表示泛指，指代复数可数名词theone表示特指相当于the+单数可数名词theones表示特指，相当于the+复数可数名词it表示特指，代替前面的名词与前面的名词是同一个that表示特指，相当于the+单数可数名词,可与theone互换也可相当于the+不可数名词those表示特指,相当于the+复数可数名词,可与theones互换(1)Abridgebuiltofstoneisstrongerthan___builtofwood.(2)Thebridgebuiltofstoneisstrongerthan____________builtofwood.(3)Bridgesbuiltofstonearestrongerthan_____builtofwood.(4)Thebridgesbuiltofstonearestrongerthan_________________builtofwood.(5)TheParkersboughtanewhousebut___________________willneedalotofworkbeforetheycanmovein.onetheone/thatonestheones/thoseit(6)---Thereisstillacopyofthebookinthelibrary.Willyougoandborrow____?—No.I’dratherbuy____inthebookstore.A.it;oneB.one;oneC.one;itD.it;it(7)Ilikethishousewithabeautifulgarden,butIdonothaveenoughmoneytobuy__.(8)Ilikethishousewithabeautifulgarden,butIdonothaveenoughmoneytobuy__.A.oneBitC.thisD.thatABA注意：that用作不定代词时，其后常跟of引起的介词短语作后置定语ExThepopulationofChinaislargerthan_______ofIndiathat二、.非人称代词itit有时并不指具体的东西，而泛指天气、时间、日期、距离、价值、度量、温度、环境等，称为非人称的it：1.指_____Itisalovelyday,isn’tit?2.指_____Itwasnearlymidnightwhenshecameback.3.指_____Itwasveryquietinthecafé.4.指_____Itishalfanhour’swalktothecity.天气时间环境距离5指_____What'sthedatetoday?It'stheeleventh,October.6指_____Itissummernow.7指_____Itisabout20pound/kg8.指_____---What'sthecostofthedictionary?---Itissixty-three.9指_____It's35centigradenow.SoIfeelhot.日期季节度量价值温度三、it的其他用法1.指心目中的人或者事物。---Goandseewhoisknockingatthedoor?---ItmustbeMary.Ex---Lookatthegirlonthestage,sheisalreadyfifty.---Youarejoking.Shedoesn’tlook__AsoBitCthatDtheoneB2.用以代替指示代词this/that---Hegothisfirstbookpublished.Itturnedouttobeabestseller.---whenwas____?---______wasin2000whenhewasstillincollege.Athat,ThisB.this,ItC.it,ThisD.that,ItD3.it用在一些词组中，it没有特别的意思:1.makeit=_______,表示：成功、做到、说定、赶上、及时到达succeed2Asithappened,…表示_____________3Asitturnedout,…表示_____________4Believeitornot.表示____________5Italldepends/thatalldepends表示______________________________6whenitcomestosomething___________________7putit=say真不凑巧，真遗憾最后被证明是信不信由你那得看情况，还没有定下涉及，谈及(09安徽)JustasProfessorScottioften______it,successisninety-ninepercentmentalattitude.A.getsB.makesC.putsD.meansC四、作形式主语，替代不定式，ing形式或主语从句1②.Itisimportant(necessary，right，strange，natural...)that...that从句中要用虚拟语气（should+动词原形），should可以省去2.①Itissaid(reported/learned/believed/thought/known/told/hoped.....)that...“据…,有人…”②Itissuggested(ordered/demanded/insisted/commanded...)that...(should)+动词原形3.①Itistime(about/hightime)thatsbshoulddosth/didsth②Itisthefirst(second...)timethatsbhave/hasdonesthExx1)---Doyouknowourtownatall?---No,thisisthefirsttimeI___here.A.wasB.havebeenC.cameD.amcoming2)Itistimethatthegovernment_____________________(take)measurestoprotecttherarebirdsandanimalstook/shouldtakeB4.Itisapity(ashame/anhonour/agoodthing/afact,/asurprise/...)that...一般用虚拟语气（should+动词原形），should可省去．表示出乎意料，常译为＂竟然＂。没有这种意义时，则不用虚拟语气。5.It常见代替动名词的句型：Itisnouse/notanyusedoingsth.Itisnogood/notanygooddoingsth.Itisfundoingsth.Itisuseless/senselessdoingsth.Itisawasteoftimedoingsth1___isourbeliefthatimprovementsinhealthcarewillleadtoastronger.moreprosperouseconomy.A.AsB.ThatC.ThisD.It2.____worriesmethewayhekeepschanginghismind.A.ThisB.ThatC.WhatD.ItDD五、作形式宾语，代替不定式、ing形式、宾语从句常用于以下两种结构①主语+谓语+it+adj./名词/过去分词+从句。常用的动词：think,believe,make,find,consider,feelEg.Hedidn’tmakeitclearwhenandwherethemeetingwouldbeheld.②主语+谓语+it+从句Eg.IlikeitwhenIlivedinthepeacefulcountry.在这个结构中，it多用在表好恶的动词，如：enjoy,like,love,dislike,hate,take(理解)，don’tmind,befondof,feellike,seeto(=makesure),cannothelp,后,再直接跟宾语从句1Hedidn’tmake___clearwhenandwherethemeetingwouldbeheld.A.thisB.thatC.itD.these2AsthebusiestwomaninNorton.shemade___herdutytolookafteralltheotherpeople’saffairsinthattown.A.thisB.thatC.oneD.itCD3I’dappreciate___ifyouwouldliketoteachmehowtousethecomputer.A.thatB.itC.thisD.you4.Ihate___whenpeopletalkwiththeirmouthsfull.A.itB.thatC.themD.these5.IfIcanhelp___,Idon’tlikeworkinglateintothenight.A.soB.thatC.itD.themBAC七.用于以下常用句式：①itis+过去分词(said/reported/believed/…)+从句“据…”②it+seems/appears/happens+that从句③itistime(forsb)todosthitistimethatsbdid/shoulddosth④itis+形容词+(of/forsb)+todosth通常用of的词为表示人的性格、品质的词，如bravecleverkindnicestupidwisefoolish等，其他的词用for.⑤itis/was+被强调部分+that/who从句⑥itis+一段时间+since从句（一般过去时）“自从…已多久了”itwas+一段时间+since从句（过去完成时）⑦itwas/willbe+一段时间+before从句“再过多久才…”⑧itisthe+序数词+time+that从句（现在完成时）itwasthe+序数词+time+that从句（过去完成时）“这是某人第几次干某事”1Itisalmostfiveyears___wesaweachotherlasttime.A.beforeB.sinceC.afterD.when2Itwassometime___werealizedthetruth.A.whenB.untilC.sinceD.before3—Howlongdoyouthinkitwillbe___Chinasendsamannedspaceshiptothemoon?—Perhapstwoorthreeyears.A.whenB.untilC.thatD.beforeBDD