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一、代词人称代词it可以用来代替一个名词、短语、句子，以免重复。(1)指代刚提到过的同一事物（同类；同一）Thisismynewcar.Iboughtityesterday.(2)指动物或不考虑性别的婴儿Whereisthecat?It’sunderthebed.Thebabycriedwhenitwashungry.(3)在情景中确认某人或事物（不知性别的人）Whoisit?It’sme.(敲门)---Who’sitoverthere?---It’sthemilkman.(4)指代前句或后句所述的情况/事情HesmokesinbedandIdon’tlikeit.Itwouldbegreatifyoucouldjoinus.(5)指时间、距离、天气或环境等（非人称代词）Whattimeisit?It’sseven.It’sabout50kilometersfromheretomyhome.Itissnowing.Itwasveryquietinthegarden.Iwasdisappointedwiththefilm，Ihadexpected_______tobemuchbetter．A．thatB．thisC．oneD．it2.Tom'smotherkepttellinghimthatheshouldworkharder,___didn'thelp.A.heB.thatC.sheD.butit二、引导词it(1)it用作形式主语:当_______,_______,_____作主语时，常用it做形式主语，It’sapitytorefuse.拒绝是令人遗憾的。It’snousesayinganymoreaboutit.再谈这事没有用。It’snotknownwhereshewent.她到哪里去了没人知道。不定式动名词从句一it用作形式主语注：A.It’snouse/nogood/nopleasure/useless/awasteof…+doingB.Itissaid(reported/believed/expected/accepted…)that…据（报道，认为…）….C.Ithappens(appears,seems…)that…;Itstruckme/occurredtomethat…突然想到..D.Itisapity(nowonder,)that…E.Itdoesn’tmatterthat……没关系;Itmakesnodifferencethat……没影响F:It’simportant(necessary,easy,kind…)___/____sbtodosth.forof他说什么都没关系。______________________________他好像总是对的。_________________________________碰巧我当时没有带钱。_____________________________据说他已经入党了。_______________________________Itdoesn’tmatterwhathesaidItseemsthatheisalwaysrightIthappenedthatIdidn’thavemoneyonme.Itissaidthathehasjoinedtheparty.1.___difficulttobeinaforeigncountry,especiallyifyoudon’tspeakthelanguage.A.ThatisalwaysB.ItisalwaysC.ItwouldbealwaysD.Thatwillalwaysbe2.___onedaytheywillhaveenoughanimalstosetthemfree.A.ItishopedforB.whatishopedthatC.AsishopedthatD.Itishopedthat(2)it用作形式宾语:当________、________、_______等用作宾语且其后跟有_____时，使用形式宾语it，而将真正的宾语移至句末。这类的动词有使役动词，find,make，feel,think,consider,seetoitthat…(务必)等。如：Ifinditeasytogetonwithher.Ithinkitbestthatyoushouldstayhere.不定式动名词从句宾补it用作形式宾语:(3)句式A.喜好：enjoy,like,dislike,love,hate,appreciateitwhen/if/that….Idon’tlikeitwhenpeopletalkwiththeirmouthsfull.Iappreciateitifyoucanhelpme.他讨厌别人用他的自行车。___________________________________我不喜欢你生气的样子。_____________________________________B.固定句式：我们花费10天去那里。Ittook________________________________轮到你来回答问题了。It’s_______turn___________________________该吃饭了。It’stimetoHedislikes/hatesitthatpeopleusehisbikeIdon’tlikeitwhenyouareangry.us10daystogothereyourtoanswerthequestionhavedinner1.Wemustmake___tothepublicthatsomethingshouldbedonetostoppollution.A.WhatisclearB.itisclearC.itclearD.thatclear2.Ihate__whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.them1）It’s(about/high)time+that-从句.(虚拟)2）It’sfirst(second)time+that-从句.“某人第几次做某事”。(从句用完成时)3）It’s/hasbeen+时间段+since-从句.“自从…有一段时间了”。4）It’s+时间段+before-从句---“过多长时间才…”5）Itisuptosbtodosth.“该由某人做某事”6)Ifitwerenotfor…/Ifithadn’tbeenfor…“若不是因为……”7)IoweittoyouthatIamstillalive.“归功于…”多亏有你我才仍然活着。8)Itookitforgrantedthathewouldhelpus.我认为他会帮助我们的。“认为…理所当然”9)Idependonitthathewillgowithus.我还指望着他能和我们一起去呢。(4)强调句Itis/was…that/who…注意以下几点：A.It后用is/was这种单数形式。B.被强调部分是指人时，用_____/_____，被强调部分指物时，用______。C.被强调部分是指时间或地点时，用that，一般不用______，________之类的。ItisIwhoamright.是我对。他是死于日本。________________________他是昨天结婚的。________________________________她是住在什么地方?_______________________________是谁教你们英语?________________________________他是什么时候来的？_______________________________________thatwhothatwhenwhereItwasinJapanthathediedItwasyesterdaythathegotmarriedWhereisitthatshelives?WhoisitthatteachesyouEnglish?Whenwasitthathecame?ThecomputersinourschoolareconnectedtotheInternetwhilethoseintheirschoolaren’t.Thefootballplayersonourteamseemtobemoreenergeticthanthoseonyourteam.That/those一般用于替换有定冠词的名词；one/ones用于替换有不定冠词的名词。Thestyleofthebuildingissimilartothatofatemple.ACDplayermadeinJapancostsmorethanonemadeinHongKong.That/those一般不带前置定语，但必须有后置定语。One/ones都可。当替换词的后置定语用所有格的of短语或当替换词被所有格修饰时，不用one/ones而用thatof/thoseof.Ilikethevasebetterthantheone/thatinanothershop.Thewindowsofyourflatarecleanerthanthoseofmine.Agrandparent’sjobiseasierthanthatofaparent.2)it,this和that都可以替代前文已提到的事或情况，细微差别在于it不如其余两者那么强调。Soshedecidedtopaintthedoorpink.Itupsettheneighboursabit.Soshedecidedtopaintthehousepink.Thatreallyupsettheneighbours,asyoucanimagine.当前面提到的事物不止一件时，it通常指最先提到的事物，而This/that是指最后提到的事物。Wekeeptheicecreammachineinthespareroom.Itismainlyusedbythechildren.(指themachine)Wekeeptheicecreammachineinthespareroom.This/Thatismainlyusedbythechildren.(指thespareroom)This可以出现在它所指代的事物之前；而that则指上文所提到的事物。Listentothis!Wewillhavethreedaysoff.“Apennysavedisapennyearned.”Whosaidthat?3)It和oneIt用以指特定的前面提到过的事物，即：it和它替换的是同一个事物，it前无修饰语；而one用于替换与前提事物有共同之处但并不完全一样的事物，因此，one之前或之后一定有修饰语来加以区别。IboughtadictionarythreeyearsagoandIamstillusingitnow.IboughtadictionarythreeyearsagobutIamgoingtobuyanewonesoon.