(完整版)it做形式主语的用法大全.doc

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1、It作形式主语常见句型动词不定式，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，常见句型有：1.It+be+形容词（important,impolite.necessary.easy,difficult.....）+动词不定式(todosth..........)Itisimpolitetokeepotherswaiting.Itisimportanttoarriveontime.2.It+be+形容词(important,impolite.necessary.easy,difficult....).+主语从句，如：Itisimportantth

2、atyoumustarriveontime..2.Infactisahardjobforthepolicetokeeporderinanimportantfootballmatch.(2001上海)A.thisB.thatC.thereD.it3.isafactthatEnglishisbeingacceptedasaninternationallanguage.(NMET1995)A.ThereB.ThisC.ThatD.It4.Isnecessarytotakeoffourshoeswhenweenterthelab?(MET88)A.everyoneB.thisC.her

3、D.it5.________willtakeyoualotoftimetofindhiminthecrowd.A.ItB.IC.WeD.They8.___________isknowntoallthatShenzhouVILaunchedSuccessfully.A.AsB.WhatC.ItD.That9._______isreportedinthenewspaper,theEarthquakeineastChina'sJiangxiProvincekilled13peopleA.ItB.AsC.ThatD.What10.___________certainthathisi

4、nventionwillmakepeople’slifeconvenient.A.That’sB.ThisisC.It’sD.What’s11._________thatthereisanotherfootballmatchontheairthisevening.A.ItsaysB.ItwassaidC.ItissaidD.Whatwassaid12.__________thattheirdaughtergotanopportunitytostudyabroad.A.It’saexcitingnewsB.ThisisanexcitingnewsC.Thisisexitingnew

5、sD.It’sexcitingnews