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It的用法高考专练1.用作形式主语，代替后面真正的主语：不定式、V-ing短语、或从句。一般有以下几种结构。(1)It+be+adj.+(forsb.)todosth.(2)Itisnouse/nogood/funtalkingtosuchamanlikethat.(3)Itisashame/apitythatyoucouldn’tstaywithus.(4)It’ssaid/known/considered/thought/believed/predicted/provedthattheglobalwarmingwillcometruesoon.(5)Itseemsthathehasnothing.=Heseemstohavenothing.Itappearedthathewastalkingtohimself.IthappenedthatIsatbyherincinema.ItisverylikelythatyouwilldieifyougetinfectedwithHIV.2．用作形式宾语，代替不定式、动词ing短语或从句表示的真正宾语。Ifindithardtocommunicatewithher.=Ifinditishardtocommunicatewithher.Shefeelsitherdutytohelpothers.You’llfinditexcitingworkingheresoon.Shethoughtitnogoodworryingabouthim.Youmustmakeitclearthatyou’llnevergiveup.*it形式主语或宾语1.AsthebusiestwomaninNorton,shemade__herdutytolookafteralltheotherpeople’saffairsinthetown.A.thisB.thatC.oneD.it2.Wedon'tconsider___necessaryfor___tobuyanewonewhentheyhavesuchagoodflattolivein.A.it;themB.that;theyC.it;usD.that;one3.Itook___forgrantedthattheywerenotcoming.A.thisB.thatC.oneD.it4.Thedoctorthought___wouldbegoodforyoutohaveaholiday.A.thisB.thatC.oneD.it*it指代前文提到的事物（无生命物、动物、植物）it特指=the/this/that/my…+n(可数单数或不可数)one泛指=a(…)+n(可数名词)1.---I’velostmydictionary.---Youhaven’tfoundit?You’dbetterbuyoneinthebookstoreassoonaspossible.2.We’vebeenlookingathousesbuthaven’tfound___welikeyet.A.oneB.onesC.itD.them3.Ilikethishousewithabeautifulgardeninfront,butIdon’thaveenoughmoneytobuy___.A.oneB.itC.thisD.that4.IwantverymuchtobuythiscolorTVset,butIcan’tafford___.A.oneB.itC.thatD.this5.---Thereisstillacopyofthebookinthelibrary.Willyougoandborrow___?---No,I’dratherbuy___inthebookstore.A.it;oneB.one;oneC.one;itD.it;it6.Catherineboughtapostcardoftheplaceshewasvisiting,addressed___to___andthenposteditatthenearbypostoffice.A.it;herB.it;herselfC.herself;herD.herself;herself*it指心目中的人或上下文提到的人，不知性别的婴儿或无法确定的人的，如打电话、敲门等。7.---Whoisknockingthedoor?---ItmustbeaMM.*it指代前文提到的事.8.ThedoctoradvisedVerastronglythatsheshouldtakeaholiday,but___didn’thelp.A.itB.sheC.whichD.he9.Thedoctorshadwarnedhimnottosmokeagainandagain,but___didn’thelpuntilhewasdiagnosedwithlungcancer.A.heB.whichC.itD.they10.Beingaparentisnotalwayseasy,andbeingtheparentofachildwithspecialneedsoftencarrieswith___extrastress.A.itB.themC.oneD.him*it指代下文提到的事、物.10.Althoughwecannotseeit,thereisairallaroundus.11.IfIcanhelp___,Idon’tlikeworkinglateintothenight.A.soB.thatC.itD.them*it指环境、情形等.12.---Doyoulike___here?---Oh,yes.Theair,theweather,thewayoflife.Everythingissonice.A.thisB.theseC.thatD.it*在动词appreciate，dislike,hate,like,love等后，跟由if或when引导的从句时，往往加上it,代替从句的内容。13.Ilike___intheautumnwhentheweatherisclearandbright.A.thisB.theseC.itD.one14.Iwouldappreciate_______ifyouwouldlietoteachmehowtousethecomputer.A.thatB.itC.thisD.you.*用在某些动词后面，it词义含糊，构成习语。makeit/have(got)it/footit/lookit/forgetit/don’tmentionit.15.---Didyoureachthetopofthemountain?---Yes.EvenImyselfdidn’tbelieveIcouldmake___.A.thatB.itC.oneD.any