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代词it一.it用做人称代词的用法it用作代词，意为“它”，既可以指人，也可以指物。it做人称代词，可以用来代替一个名词、短语、从句或句子，以避免他们在句中的重复。这是可以指提到过的，也可以指未提到的，在句中做主语、表语和宾语。1)指事物，it可以指除人以外的任何事物或动物。Idroppedmywatchanditbroke.我把手表掉在地上摔坏了。2)指人，it主用用于指性别不明的婴儿或只听其声不见其人的人，如：Isitaboyoragirl?是男孩还是女孩？Thereisaknockonthedoor.Itmustbethepostman.“Listen.Someoneiscrying.”“Oh,itmustbeMary.”3）代替某些代词。代词it可以用于代替指示代词this,that以及复合不定代词something,anything,nothing等，如：“What’sthis?”“It’sanewmachine.”二.it用作非人称代词的用法1)it用作非人称代词用来指时间、距离、价值、天气、气温及温度等。如It’stoolatetogotherenow.现在去那已经太迟了。Itrainedalldayyesterday.昨天下了一整天雨。2)用于某些句型。It’stimeforsth.该做某事了。It’stimetodosth.是时候该做某事了。It’stimeforsbtodosth.某人该干某事了。C-代词it的基本用法知识梳理It’s(about/high)time+that--从句。某人该做某事了。It’sfirst(second)time+that--从句。某人第几次干某事。（从句谓语动词用现在完成时）It’s+时间段+since从句。自从…以来有一段时间了。It’s+时间段+before从句。过多长时间才…三.it用作形式主语的用法。1)当不定式、动名词、从句等复杂成分做句子主语时，为保持句子的平衡，通常把真正的主语放在句末，而句首使用形式主语it。如It’sveryimportanttorememberthis.It’shardworkclimbingmountains.It’sunknownwhenhewillcome.2)it用作形式主语的重要句型：①It+be+adj.+for(of)sbtodosth.某人做某事是…的Itishardforhimtomakeuphismind.他很难下定决心。Itwasfoolishofhertosaysuchathing.她说那样的话，太愚蠢了。提示：此句型中的介词of和for的区别是：of用于指某人的性格，属性，特征等。介词for表示对象，意为“对…来说”。②Ittakes/tooksb+时间段+todosth.某人做某事花了…时间。Ittookmetwohourstofinishmyhomework.③Itisuptosbtodosth.该由某人做某事了。It’suptoyoutomakethechoice.该由你来做选择了。④Itlooks(seems,appears,happens,occurs)that(asif)…似乎…Itseemsasthoughhedidn’trecognizeme.四.it用作形式宾语的用法。1)当不定式、动名词、从句等复杂成分用作宾语且后面跟有宾语补足语时，通常会在宾语补足语前使用it作形式宾语，而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式（动名词或从句）”。Ifinditdifficulttodothejobwell.Ithinkitbestthatyoustayhere.Wethinkitnousecomplaining.2)用作形式宾语的几个特殊结构：①动词+it+that-从句Ithinkit(that)hewillcomeontime.②动词+it+when(if)-从句Wereallyappreciateitwhensheofferedtohelp.③动词+prep.+it+that-从句Ican’tanswerforitthathewillcome.我不能保证他会来。④动词+it+介词短语+that-从句Itookitforgrantedthathewouldhelpus.五.it在强调句中的用法。强调句的基本结构是：It+be+被强调部分+that(who)+其他部分。单项选择1.Itwasatthegate____hetoldmethenews.A.thatB.whatC.whichD.when2.Is____necessarytotellhisfathereverythingA.itB.thatC.whatD.he3.Wasitinthispalace____thelastemperordied?A.thatB.inwhichC.inwhereD.which4.Is____possibletoflytothemooninaspaceship?A.nowB.manC.thatD.it5.WasitduringtheSecondWorldWar____hedied?A.thatB.whileC.inwhichD.then6.Is____necessarytocompletethedesignbeforeNationalDay?A.thisB.thatC.itD.he能力提升7.Idon'tthink____possibletomasteraforeignlanguagewithoutmuchmemorywork.A.thisB.thatC.itsD.it8.Does____matterifhecan'tfinishthejobontime?A.thisB.thatC.heD.it9.Itwasnot____shetookoffherdarkglasses____Irealizedshewasafamousfilmstar.A.when;thatB.until;thatC.until;whenD.when;then10.Tom’smotherkepttellinghimthatheshouldworkharder,but____didn’thelp.A.heB.whichC.sheD.it11.____isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It12.Is________possibletoflytothemooninaspaceship?A．nowB．manC．thatD．it13．Ourfoodandservicearebetterthan________usedtobe.A．itB．weC．theyD．them14．________appearstome________thereportmustbetrue.A．That;itB．It;thatC．It;itD．That;that15．Hefeels________dutytohelpothers.A．thatheB．thathisC．itheD．ithis16．Take________easy.Theroadsareicy.([词典]不紧张;松懈;不生气;不激动)A．itB．themC．usD．you17．________was________whoImetinthemuseumthismorning.A．It;himB．It;heC．That;heD.That;him18．——Haveyoufoundthebikeyoulostyesterday?——Yes,I'vefound________already.A．itB．thatC．theoneD．thatone19.Someoneisatthedoor,whois?A.thisB.thatC.itD.he20.—Itisrainingcatsanddogs.—.A.SoitisB.SoisitC.NeitheritisD.Neitherisit1.Itdoesn’tmatter…Itdoesn’tmatterwhathesays.他说什么都没关系。2.Itappears/seems/happens/saysthat…Itseemsthatheisalwayscorrect.他好像总是对的。IthappenedthatIhadnomoneywithme.碰巧我当时没有带钱。3.Itissaid/reported/believed/understoodthat…ItissaidthathehasjoinedtheParty.据说他已经入党了。4.Itisawasteoftime/moneydoingsth.It’sawasteoftimeyourtalkingtohim.你和他谈是浪费时间。5.(Itis)nowonder(that)…It’snowonderheisnothungry;hehasbeeneatingsweetsallday.难怪他不饿，他整天在吃糖果。6.Itmakesno/mushdifference…It’sdoesn’tmakemuchdifferencemybeingthere.我在不在那儿没有什么影响。7.ittakessb.sometimetodosth.Ittookmenearlyanhourtoworkouttheproblem.花了我差不多一个钟才做出那道题.8.It’sone’sturntodosth.It’smyturntocleantheclassroom.是轮到我打扫教室的了。9.Ifitwerenotfor…小结C-含it的9个常用句型知识梳理Ifitwerenotforyourhelp,Iwouldstillbehomeless.若不是你帮忙，我现在还是无家可归。小结