高中英语it的用法教案

英语高考专题复习讲与练2It用法一、考点聚焦1、it的根本用法(1)用作人称代词，代替前文提到过的事物。Thetrainhasarrived.Itarrivedhalfanhourago.(2)用以代替提示代词this,that。一Whafsthis?—It'saknife.—Whosewatchisthat?一It'smine.(3)起指示代词的作用，指一个人或事物。—Whoisknockingatthedoor?—It'sme.(4)指环境情况等。Itwasverynoisy(quiet)attheverymoment.(5)指时间、季节等。-Whattimeisit?-Il'seighto'clock.Itoftenrainsinsummerhere.(6)指距离。Itisalongwaytotheschool.(7)作形式主语。Itisnoteasytofinishtheworkintwodays.Itisnousecryingoverspiltmilk.Itisaspilythatyoudidn'treadthebook.⑻作形式宾语。Ithinkitnousearguingwithhim.IfounditveryinterestingtostudyEnglish.Hemadeitclearthathewasnotinterestedinthatsubject.(9)用于强调结构。ItwasXiaomingwhom(thal)!metinthestreetlastnight.ItwasinthestreetthatImetXiaominglastnight.ItwslastnightthatImetXiaominginthestreet.ItwasIwhometXiaominginthestreetlastnight.2、含有“Ilis…”的句型Itistime(forsb.)todosth.Itis(high)timethatsb.didsth.(虚拟语气)Itis+形容词(+of/forsb.)+todosth.通常用of的词有brave、clever>carefulhopeless>kind^good、naughty>nice^silly、stupidsfoolish、wise等。Itis+形容词+that+sb.+(should)dosth.(虚拟语气)能用于这个句型的形容词有strangewonderfulnaturalgood、proper、right、wrong、well、fortunateximportant>necessaryuselesslikely^probable、impossible等。有时可省去should而直接用动词原形。如：Itisimportantthatweshouldpaycloseattentiontograin.Itisnaturalthathe(should)sayso.Itisnouse/good+doingsth.Itisnousetryingagain=Itisofnousetotryagain.Itis+被强调局部+that/who+...Wasitinthestreetthatyoumether?Whowasitthatcalledhim“comrade"?ItwasnotuntilyesterdaythatImetmyoldfriend.Itisinasmallfactorythatmybrotherisgoingtowork」注意上述各句均为强调句型的“考占“)比拟：Itisasmallfactorywheremybrotherisgoingtowork.(定语从句)Itissaid/reported/announced/(well)known...that...Ilis/was+时间+since...从已多久了。ItisthreeyearssinceImethiminBeijing.ItwasalongtimesinceI(had)livedinthatsmallmountainvillagewiththesefarmers.(注意两句中的时态)ItisfivemonthssinceIarrivedinNewYork.我到纽约已经五个月了。ItisfivemonthssinceIwasinNewYork.我离开纽约已经五个月了。(注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则从动作或状态结束时算起。)Itis+时间+before...这个句型和上面句型中时间都是时间段，如long、years>monthssweeks、fivedays、threehours、twentyminutes等。不过主句的时态多用一般将来时或•般过去时。Itwillbeseveralyearsbeforewemeetagain.我们要过好几年才能再见面。Itwasnotlongbeforetheysetoutforthefront.不久他们就出发去了前线。Itis/was/willbethefirst/second/third...timethat...ItisthefirsttimethatIhavebeenhere.Itwasthesecondtimethathehadseenthefilm.Itisuptosb.todosth...应由某人做某事。1(isuptoyoutodecidewhetherwestartornot.二、精典名题导解选择填空1.isafactthatEnglishisbeingacceptedasaninternationallanguage.(NMET1995)A.ThereB.ThisC.ThatD.It解析：答案为D。此题考查作形式主语的用法。that引导的从句是真正的主语。为防止头重脚轻而平衡句子结构，将it置于句首作形式主语。2.1hopetherearcenoughglasseforeachguesttohave.(NMET1995)解析：答案为D。此题考查替代词it和。ne的区别。it用于替代同类的、特定的、同•的事物；one替代同类的、泛指的人或物。根据题意“我希望有足够的杯子使每个客人有一个。”可知应用one泛指enoughglasses中的一个。3.WasthatIsawlastnightattheconcert?A.ityouB.notyouC.youD.thatyourself解析：答案为Ao此题考查强调句型的疑问式。只须将句序变为陈述句便不难得出答案。三、常见用法有以下几类：1、it可用于代替上文中提到的那一个事物。2、it可用于代替上文中说到的一件事。3、ii可用于代替不知情的人［尤其是不知身份、性别和姓名的人)。4、it可用于表示时间、天气、距离、计算结果等。5、it可用于代替不定式、动名词、从句等，充当形式主语。其常用句型为：It-be—adj./n./v-ed—(o+V/V-ing/Clause6、it可用于代替不定式、动名词、从句，充当形式宾语，把真正宾语(不定式、动名词、名词或从句)置于句末。其常用句型为：S-Vt---it—adj./n.—to+V/V-ing/n./Clause7、it可用于构成强调句，把一个句子中除谓语以外的句子成分(如主语、宾语、表语、状语等)提到句首加以强调。其构成形式是：Itis(was)+被强调成分(不能改变被强调成分的数和格)+that/who+原句剩余局部8、it常用于一些固定结构中，作无人称代词用，充当主语等。it用法专题练习1：1---What'sthis?---amapofChinaA.ThisisB.ThafsC.IfsD.Thcrc's2-Whereismypen?…onthedesk.A.ThisisB.That'sC.It'sD.There's31wasdisappointedwiththefilm.Ihadexpectedtobemuchbetter.4Theyoftenhelpuswithourresearch.kindofthem.A.TheyareB.YouareC.ItisD.Thisis5Tom'smotherkepttellinghimtoworkharder,butdidn'thelp.6Johnpassedtheexamsuccessfullyandwasmorethanwehadexpected.7---Who'sknockingatthedoor?—me.A.IfsB.rmC.That'sD.Thisis8--Who'sthebabyinthephoto?…mybrother.A.ThisisB.That'sC.It'sD.There'sSundaytoday.Let'sgofbranouting.A.ThereisB.It'sC.ThisisD.That'swasrainingheavilywhenthefilmwasover.11alongwayfrommyhometotheschool.A.ItisB.ThisisC.Thereis12--What'stenaddedtosix?D.Therehasbeen一sixteen.A.ThereisB.itisC.Thisis13importanttolearnEnglishwell.D.WehaveA.ThisisB.That'sC.It'sD.There's14greatfuntoplaybasketballafterschool.A.IthasB.itisC.ThisisD.Therehas15_nouseaskingthemforhelp.A.IthasB.itisC.ThisisD.Therehas16_awasteofmoneysmokingalot.A.IthasB.itisC.ThisisD.Therehasstrange(hatheshouldsaysuchwordstoyou.A.IthasB.ItisC.ThisisD.TherehassaidthatonlythreepeoplecouldunderstandEinsteinatthattime.A.IthasB.ItisC.ThisisD.Therehas19Einstcinfoundhardtogetalongwiththeotherboysatschool.TOC\o"1-5"\h\zA.itsB.ifsC.itD./20Theyfeelapitythattheyshouldmissthewonderfulfilm.A.itsB.thisC.itD./21Thedustyairmakesdifficulttogetaclearpicture.A.itsB.it'sC.itD./221findnoneedgoingtotownwithoutanymoneyonme.A.itsB.thisC.itD./23Hethinksadutytoworkforthepeople.A.itsB.thisisC.itD./24Wefeelapitywe(should)missthechanceofgoingtotheparty.A.its,thatB.thisjhatC.it,thatD.that,thatwasnotuntilhegottotheofficeherememberedleaving(hekeyhome.A.It,itB.It,thatC.it,whenD.That,whcnamreadytohelpyououtofthedanger.A.ItisIwhoB.itismewhoC.itismethatD.ThisismethatEnglishIwilltrytolearnwell.A.Itis,thatB.Thisis,thatC.That,whichD.Thereis,which28---I'mafraidIcan'tdothejobasyoutoldmeto.---matter.A.Youdon'tB.Itdoesn'tC.Thereisn'tD.Thisisn'tyearsIenjoyedmyselfsomuch.A.Itis,thatB.Thereis,lhatC.Ilis,sinceD.Therehas,sinceayearIgotocollege.A.Itwillbc,beforeB.Itwillbe,whenC.Thiswillbe,whenD.Ithasbeen,thatwon'tbelonghecatchesupwithus.A.It,beforeB.There,befbre《.That's,whenD.It,whendoesn'tmatterwhetherhecomesornot.matterwhenhewillcomebackhome?A.DocsitB.DoyouC.DocsheD.Docsthisit用法专题练习2.isfouryearssinceIleftmyhometown..isnogoodwithoutdoinganything.A.This,talkingB.It,totalkC.It,talkingD.That,totalk.Thepeopletherefeltnotsodifficulttoworkwithhim..Howlongtofinishthework?A.you'lltakeB.willtakeyouC.you'lltakeitD.willittakeyou5.isalongwaytoschool,whichmeansisalongwaytogobeforewearrive.A.It,thereB.There,itC,It,itD.There,there.Mike'smotherwasalwaystellinghimthatheshouldnotbelazy,butdidn'thelp..youmetJane?A.WherewasthatB.WhowasitthatC.WherewasitthatD.Whereitwasthat.Whowasthatcalledhim“comrade"?.Theyarcallclassmates.isnowonderthattheyshouldhelpeachotherwiththeirstudies..toallthatTaiwanisthelargestislandinChina.A.AsknowsB.AsweknowC.ItisknownD.Whatisknown1LitwasinthelabwastakenchargeofbyProfessorBlacktheydidtheexperiment.A.that,whereB.which,thatC.whom,thatD.which,where12.willbeyearswemeetagain.A.There,sinceB.There,afterC.It,thatD.It,before13.seemsunlikelythathewillcatchthetrain.14.iseasy(olearnEnglish,butisdifficulttolearnwell.A.It,it,thisB.It,this,itC.It,it,itD.It,which,which15.1don'trememberhowmanyyearsagoIlastmetyou.A.itwasthatB.thatwasitC.wasitthatD.thatwaswhen.—youleftschool?…Aboutayearago.A.WhenwasthatB.WhenwasitC.WhenwasitthatD.How