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It用法归纳一、指代it二、形式it三、强调it四、含有it的句型一，指代it1.用来指代上文提到的事物。1.----Passmeyourpen.-----Hereitis.2.Whateveryoudoandsay,askyourselfwhetheritiswelcomedbyothers.3.TheOlympicGamewillbeheldinBeijingin2008.ItmakestheChineseproud.2.表示时间，天气，距离，温度等。It’s10:081.Itwascoldyesterday.2.Itmaybe25kmsfromheretothetown.3.Itwasveryquietinthecafé.3.、作为人称代词，it可以用来指东西、动物、婴儿和未确定身份的人。1.Where'smylefteye?Haveyouseenit?2.Thecatisinthegarden,isn'tit?3.Thebabycriedbecauseitishungry.4.(有人在敲门）Whoisit?It’slovelyItweighsonly3kilos.It’salargesumofmoney.4.表示谁在做某事的句子：1.---Whoisit?---It’sme.2.Herfacelightedwhenshesawwhoitwas.5.用来泛泛的指某件事：1.Itdoesn’tmatter.2.Itisashame,isn’tit?3.Soyouaregoingtobemarriedthistime？Whenisit？•特别注意：it,one和that作替代词的用法及区别1.it代替前面提到的同一事物,该事物既可以是可数名词也可以是不可数名词。Thenewsthattheyfailedtheirdrivingtestupsethim,________?A.didtheyB.didn‘ttheyC.diditD.didn’tit2.one代替前面提到的同类事物中的一个。该事物只能是可数名词,前面可以有冠词,也可以被this、that或形容词修饰,其后也可以有定语。-Whydon‘twehavealittlebreak?-Didn’twejusthave________?A.itB.thatC.oneD.this•3.that代替前面提到的同类事物中特指的一个。该事物既可以是可数名词也可以是不可数名词,要有后置定语,但不可以有前置修饰语。•Fewpleasurescanequalto________ofacooldirnkonahotday.A.someB.anyC.thatD.those二，形式it-------形式主语，形式宾语1.Itisnecessarytobepreparedforajobinterview.Havingtheanswersreadywillbeofgreathelp.2.Itisknowntoeverybodythatthemoontravelsroundtheearthonceeverymonth.形式主语1.Itisclear(obvious，true，possible，certain....)that.....1.Itisveryclearthathe’sroundandtalllikeatree.形式主语2.Itisimportant(necessary，strange，natural...)that...that后的从句中要用虚拟语气（should+动词原形。Itisimportantthatwe(should)haveenoughrice.Itisnecessarythathe(should)rememberthesewords.形式主语3.It'ssurprisingthat…(should)………竟然……例It'ssurpringthatyoushouldapologizetoherwithoutanyreason.形式主语4.Itisapity(ashame...)that...that后的从句一般用虚拟语气（should+动词原形），常译为“竟然”。没有这种意义时，则不用虚拟语气。Itisapitythatsuchathing(should)happeninyourclass.Itisapitythatheisilltoday.5.Itisourhope(aduty/anhonour...)that...例TheForeignMinistersaid,“Itisourhopethatthetwosideswillworktowardspeace.”译。1.很荣幸能请你来为我的小狗洗脚。It’sanhonourthatIcaninviteyoutocometowashthelegsformydog.2.照顾老人是我们的职责。It’sourdutythatwetakecareoftheold.6.Itissaid(reported，learned，thought,believed,knownhoped,expected,agreed,accepted,decided,planed,understood,）that...常译为“据说（据报道，据悉．．．）”。Itisreportedthatanotherearthsatellitehasbeenputintoorbit.7.Itissuggested(ordered/demanded/insisted/commanded...)that...that后的从句要用虚拟语气（should+动词原形），should可以省；常译为“据建议；有命令．．．）Itissuggestedthatthemeeting(should)beputoff.Itwasorderedthatwe(should)arrivethereintwohours.8.Ithappens(seems，appears,comeabout,turnout,)等不及物动词+that...碰巧．．./////看来．．．///似乎….Ithappened（chanced）thathemethisteacherinthestreet.看来他是吃错了药。Itseemsthathetookthewrongmidicine.结果是他吃到了五花肉（panceta)。Itturnedoutthathehadpancetafinally.9.Itisadj(forsb.)todosth.important，necessary，natural，impossible，unusual，rare，normal，easy，hard，difficult，dangerous，pleasant，likely,right,wrong,,,clear,obvious,certain,suitable,proper,useful,等。10.Itisadj(ofsb.)todosth.good（好心的），nice（有教养的），polite，kind，brave，careless，honest，modest，considerate,naughty，wise，clever，thoughtful,careful,crazy，bad，lazy，rude，cruel，foolish，silly，stupid，.等。这个句型可以改写为：sb.isadjtodosth.。Itiskindofyoutosayso.=Youarekindtosayso.•11.It替代作主语的动名词It‘snogood/usedoing…It's(well)worthdoing…例It'snousecryingoverspiltmilk.12.Ittakessb....todosth.“做．．．要花费某人．．．”。IttookthousandsofpeoplemanyyearstobuildtheGreatWall.13.Itdoesn’tmatterwhether(if)...“不论（是否）．．．没关系．．．。Itdoesn’tmatteriftheyareold.形式宾语1.动词+it+形容词/名词+（forsb+）todo+that从句think,believe,suppose,consider,feel,make,Keep…harduselessworthworthwhile…nouse/nogood/worthone'swhile/awasteoftime/money/energy/words2.动词+it+形容词+that从（should）important/unimportant/necessary/unnecessary/natural/essential形式宾语Thechairmanthought___necessarytoinviteMr.ObamatovisitPeking.A.thatB.itC.thisD.him例.我认为你去参加这会议很重要。Ithinkitimportantthatyou(should)attendtheconference.形式宾语3.动词+it+as+noun/adj.+从句accept,regard,take,see,view例Thespeakertakesitasencouragingwhenmanystudentsattendhislecture.4.动词+it+tosb.+that…oweittosb.that…把…归功于…leaveittosbthat…把…留给某人去做takeitforgrantedthat把…想当然keepitinmindthat…把…记在心里例1.Don'tbothertotidyyourroom.Justleaveittometodo.他想当然的以为女朋友会再回来。Hetookitforgrantedthathisgirlfriendwouldcomebackagain.5.动词+it+thatenjoy,like,/love,dislike,appreciatehate,don'tmind,befondof,feellike,seeto/dependon/insiston例IhateityoucandancesowellbutIcan't.Ilike(enjoy,hate…)itwhen….Iwouldappreciateitif…6.动词make+it+arule+that从句译，他习惯于天亮前起床。Hemakesitarulethathegetupbeforedawn.形式宾语1.Itistime(abouttime，hightime)that...从句应该用虚拟语气，①常用过去时态表示虚拟．②有时也用should+动词原形，should不能省，常译为＂是（正是）．．．的时侯．．．＂Itistimethatchildrenshouldgotobed.=Itistimethatchildrenwenttobed.四，含有it的句型2.Itisthefirst(second...)timethat...ItisthefirsttimeIhavebeenhere.=ThisisthefirsttimeIhavebeenhere.含有it的句型3.Itis....since...。since引导的从句通常是一般过去时态，而且是瞬间动词。“做某事已经多久了”Itis(hasbeen)5yearssincehisfatherdied.4.Itis…since+延续性动词的过去式“不做某事已经多久了”例。It‘s10yearssincehehadbreakfast.含有it的句型5.Itis...when...。when引导时间状语从句，主句中的it指时间，表语由具体的时间充当，常译为＂当．．．的时候，是．．．＂Itwas5o’clockwhenhecamehere.6.Itbe...before...when从句中常是将来一般时或过去时两种时态．