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Unit4GlobalwarmingLearningaboutLanguageLearningaims1.CheckuptheanswersoftheexercisesonP28.2.LearnanewGrammar—It的用法及强调结构()1.Lookatthepicture.Itisapictureofourschool.()2.It’shalfpasteightnow.()3.It’sonlyhalfanhour’swalkfromheretoourschool.()4.Itrainsheavily.()5.Itisquiethere.()6.Itispossiblethatwewillwin.()7.Ithinkiteasytoputonweight.Reviewtheuseof“it”Matchthefunctionof“it”withtherightsentence:CADEBFGLeading-inA.代指时间B.代指环境C.代指物件D.代指距离E.代指天气F.形式主语G.形式宾语TranslatethefollowingsentencesintoChinese.Itishumanactivitythathascausedthisglobalwarming.Humanactivityhascausedthisglobalwarming.人类活动导致了全球气候变暖。正是人类的活动导致了全球气候变暖。Observethesentencesabove,andthinkaboutthefunctionof“it”here?“It”isusedforemphasis(强调)here.Inthearticletherearetwomoresimilarsentences.1.ItwasascientistcalledCharlesKeeling,whomadeaccuratemeasurementsoftheamountofcarbondioxideintheatmospherefrom1957to1997.2.Theyalsoagreethatitistheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide.It的用法及强调结构1.代词（1）用作人称代词,代替前文提到的事物。Mywatchismissing.Ican’tfind(it)anywhere．Herfatherhasgoneabroad.Haveyouheardabout(it)?（2）代替指示代词this,that。What’sthis?(It’s)acomputer．Whosepenisthat?(It’s)mine．Grammar（3）表示时间、天气、距离、季节、度量等。It’stimeforlunch.It’sgettingwarmerandwarmer．It’sfortyyearssincemyhometownwasliberated．It’ssummernow．Howfarisitfromheretotheairport？It’sabouttwentyminutes’walkfromheretothebusstop．2.引导词（1）作形式主语,代替由不定式,动名词或从句表示的真正主语。其基本句型为：It(形式主语)+adj.+to+v.It(形式主语)+adj.+that(subject(主语)+v.)It(形式主语)+adj.+whether(subject+v.)Itis＋adj.＋for／(of)sb.todosth.It＋seems(appears)＋that(subject＋v.)happens③Is____possibletomasteraforeignlanguageintwomonths?在两个月内掌握一门外语可能吗？①Itisveryimportanttohelpeachother．相互帮助非常重要。②Itisnouse/uselessgoingthereagain．再去那里是没有用的。it(2)作形式宾语,代替由不定式、动名词或从句表示的真正宾语。其基本句型为:主语＋谓语＋it(形式宾语)＋宾语补足语＋todosth.(doingsth.或that从句).①MarxfounditimportanttostudythesituationinRussia．②Shethoughtitnousewritingtohimagain.③Doyouthink___difficulttoworkoutthismathsproblem?（it/that)it(3)用在强调句型中,为了强调句子的某一成分(通常是主语、宾语或状语),常用结构:Itis/was＋被强调部分＋that(who)….注意：此结构强调的成分仅限于主语、宾语和状语。例如：原句：Myfatherdidtheexperimentinthelabyesterdayevening．强调主语：Itwasmyfatherwho/thatdidtheexperimentinthelabyesterdayevening．强调宾语：Itwastheexperimentthatmyfatherdidinthelabyesterdayevening．强调时间：（2017•天津高考）ItwaswhenIgotbacktomyapartmentthatIfirstcameacrossmynewneighbors.强调地点：Itwasinthelabthatmyfatherdidtheexperimentyesterdayevening．1.Itwaslastnight_____IsawthefilmStarWars．(that/who)2.Itistenyears_____MissGreenreturnedtoCanada．(that/since)【即学即练】thatsince强调句型的一般疑问句形式为:Is/Wasit..that/who...?强调句型的特殊疑问句形式为:特殊疑问词+is/was+that...not...until结构的强调句型为：Itis/wasnotuntil...that...注意：否定词not要转移到until前面。that后应用肯定形式。IsitprofessorWangthat/whoteachesEnglish?Whenisitthatyouwillsetoff?Itwasnotuntil10o’clockthathewenttobed.1.（2016•天津高考）Youarewaitingatawrongplace.___________________thecoachpicksuptourists.你等错地方了。长途客车是在宾馆接游客。2.（2015·湖南高考)____________wewerereturninghome_____Irealizedwhatagoodfeelingitwastohavehelpedsomeoneintrouble.正是当我们回家的时候我意识到帮助那些困难中的人是多么好的感受。【高考链接】用强调句完成句子。ItisatthehotelthatItwaswhenthat3.(2014·四川高考)______becauseJackcamelateforschool_____Mr.Smithgotangry?史密斯先生很生气是因为杰克上学迟到吗?Wasitthat每空填一词,使该句与所给句子的意思相同。1.Wedependonenergytodomanythings._____energy____wedependontodomanythings.2.Hedidn’tgotoschoolbecausehewasill.______becausehewasill______hedidn’tgotoschool.ItisthatItwasthatClassexercises3.Myfatherdidn’treturnuntil11o’clocklastnight._______________11o’clock______myfatherreturnedlastnight.4.Davidboughtawalkmanfromastoreyesterday.______David_________boughtawalkmanfromastoreyesterday.ItwasnotuntilthatItwasthat/who5.Themountainclimberwasrescuedwiththehelpofthelocalpeople.______withthehelpofthelocalpeople______themountainclimberwasrescued.6.Herunclemovedoutofthecityandsettleddowninasmallvillageforthisreason._______forthisreason______herunclemovedoutofthecityandsettleddowninasmallvillage.ItwasthatItwasthat7.Whatonearthdoyouwantmetosay?_______________youwantmetosay?8.Ididn’treceivethemanager’sreplyuntilnearlyamonthlater._______________nearlyamonthlater______Ireceivedthemanager’sreply.WhatisitthatItwasnotuntilthat9.MarxmetTracyinParisin1845.______inParis____MarxmetTracyin1845.10.Thefootballmatchhadtobecalledoffbecauseitrainedheavily.______becauseitrainedheavily______thefootballmatchhadtobecalledoff.thatItwasthatItwas11.Itwasthisvillage_______Iwasbroughtup.12.Itwasinthisvillage______Iwasbroughtup.wherethat13.—Wasitunderthetree______youwereawaytalkingtoafriend?—Sure.ButwhenIgotbackthere,thebikewasgone.thatHomeworkMakefoursentenceswith“it”foremphasis.