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Unit4GlobalWarming
Part2LearningaboutLanguageⅠ.根据汉语提示,写出以下句子中的单词或短语1.He’salwayshada________(倾向)tomadness.[答案]tendency2.Theplanreceived________(普遍的)supportthroughoutthecountry.[答案]widespread3.Hisbooksare________(根本上)soldatlowprice.[答案]onthewhole4.Thegreenhouseeffectgivestheearth’ssurfacethe________(平均)temperatureof15℃.[答案]average5.Lowlyingcountriesfeeltheirvery________(存在)isindangerfromrisingsealevels.[答案]existence6.Inthefuture________(外部的)spacemightprovideuswithnewenergysources.[答案]outerⅡ.根据课文内容,完成以下句子。1.造成全球变暖的是人为的行为,而不是一个随意的自然现象。Itis________________thathascausedthisglobalwarming________________arandombutnaturalphenomenon.[答案]humanactivity,ratherthan2.把1957年到1997年之间的大气层二氧化碳的含量做出精确计算的是一位叫查尔斯·基林的科学家。________________ascientistcalledCharlesKeeling________madeaccuratemeasurementsoftheamountofcarbondioxideintheatmospherefrom1957to1997.[答案]Itwas,who3.________________theburningofmoreandmorefossilfuels________hasresultedinthisincreaseincarbondioxide.(用强调句型).[答案]Itis,that完全免费,无需注册,天天更新!Ⅰ.语法讲练it的用法(Ⅱ)——it用于强调句型中强调句型是英语中常用句子结构,又是高考中的常见考点,其根本结构为:It+be+被强调局部+that+句子其余局部。现将其用法归纳如下:1.强调句型中,能够被强调的句子成分通常为主语、状语、宾语等,不能用来强调谓语动词、表语、补语、让步状语、条件状语等。例如ItwasintheparkthatImetmyoldteacheryesterday.(强调地点状语)ItwasyesterdaythatImetmyoldteacherinthepark.(强调时间状语)ItwasmyoldteacherthatImetintheparkyesterday.(强调宾语)ItwasIwhometmyoldteacherintheparkyesterday.(强调主语)[动手练习]①Itwas________hesaidandsomething________hedid________disappointedmeatthattime.A.what;that;thatB.that;what;thatC.what;what;thatD.what,that;what答案:A②Ican’tquiteremember________IwastakentoBeijing.A.thatitwaswhenB.whenitwasthatC.whenwasitthatD.thatwasitwhen答案:B③Wasit________hewasseriouslyillthathedidn’tcometoschoolyesterday?A.although B.thatC.because D.since答案:C④ItwasonlywhenIrereadhispoemsrecently________Ibegantoappreciatetheirbeauty。A.until B.thatC.then D.so答案:B⑤________hecamebackhomethatweknewwhathadhappened.A.Whenitwas B.ItwaswhenC.Wasitwhen D.Whenwasit答案:B2.强调句型中,连接词一般用that,如被强调的局部是人,也可用who/whom,其他一律用that,不能用which,where,when等,即使被强调的是物、时间状语或地点状语。例如Itwasatthegatethatwemettheinspectorsthismorning.Itisourheadteacherthat/who/whomweoftenturntoforhelp.Itwaslastnightthatweheldameeting.[动手练习]①Itwasonmywayhome________myfathermadethepromise________IcandowellinnextexamhewillbuymewhateverIwant.A.that;that B.where;thatifC.that;if D.that;thatif答案:D②________wasin1989________Igraduatedfromtheuniversity.A.That;that B.It;thatC.That;when D.It;when答案:B③Itisonlyinthepastfewyears________greatchangeshavetakenplaceinourcity.A.which B.thatC.when D.then答案:B④Itwasabout600yearsago________thefirstclockwithafaceandanhourhandwasmade.A.that B.untilC.before D.when答案:A3.强调结构中,无论被强调的是人还是物,单数还是复数,be动词一律用单数is/was形式,如果原句的谓语动词是一般过去时,就用was;是一般现在时,就用is。也可以用“情态动词+be”形式。例如:Itwasthefarmersthatlivedahardlifebeforeliberation.ItmightbeyesterdaythatJohnboughtabookforMary.[动手练习]①It________yesterdaythatTomboughtagiftforJack.A.is B.willbeC.be D.was答案:D②It________themanagerthatspoketoyoujustnow.A.canbe B.isC.musthavebeen D.willbe答案:C③It________MikeandMarywhohelpedtheoldmanseveraldaysago.A.was B.areC.were D.hadbeen答案:A④It________thedoctors,aswellasthenurses________arefightingagainstSARSthatshouldberespectedandloved.A.is;whom B.is;whoC.are;that D.was;which答案:B4.强调句型也有疑问句形式,包括一般疑问句、特殊疑问句和反意疑问句。一般疑问句的强调形式,只需将is/was提前,移至句首即可,即:Is/Wasit…that…。特殊疑问句的强调形式,须将陈述句变成一般疑问句,再在句首加上疑问词,即:疑问词(被强调局部)+is/was+it+that+句子其余局部。例如:Wasitlastyearthatthebuildingwascompleted?WherewasitthatyoumetyourEnglishteacher?Itwasthedaybeforeyesterdaythatyoulostthemoney,wasn’tit?[动手练习]①Wasitthroughtheteacher________youcametorealizetheimportanceoflearningEnglish?A.who B.whomC.how D.that答案:D②________electricityplaysanimportantpartinourdailylife?A.Whywasitthat B.WhyisitthatC.Whyisit D.Whyitisthat答案:B③Whowasit________wantedtoseemejustnow?A.that B.whomC.when D.he答案:A④________youmettheforeignerfromCanada?A.WhereitwasthatB.WhoitwasthatC.WherewasitthatD.Wherewasthat答案:C⑤Was________thatIsawlastnightattheconcert?A.ityou B.notyouC.you D.thatyourself答案:A5.not…until…结构在强调句型中的运用:until引导的时间状语从句,也可以用在强调句型中,但主要是其否认形式,如用在强调句型中,必须将not前移,写成Itis/wasnotuntil…that…。例如Itwasnotuntiltheclassbeganthathecamein.ItwasnotuntillastFridaythathefinishedreadingthebook.[动手练习]①Itwasnotuntillateintheevening________herhusbandarrivedhome.A.which B.whenC.that D.how答案:C②Itwasnot________shetookoffherdarkglasses________Irealizedshewasafamousfilmstar.A.when;that B.until;thatC.until;when D.when;then答案:B③Itwasnotuntilmidnight________theyreachedthecampsite.A.that B.whenC.while D.as答案:A6.当强调的是主语时,其谓语动词应和被强调的人或物保持人称、数的一致。如果被强调的主语是人称代词,宜用主格,或用宾格。例如ItisIwhoamgoingtoattendthemeeting.ItwasI/mewhocleanedtheclassroom.[动手练习]①Isit________whowantstoseeyou.A.they B.heC.his D.himself答案:B②Wasit________thatyoureferredto?A.he B.sheC.her D.they答案:C③ItisTomwhooften________mewithmyEnglish.A.help B.helpedC.helps D.helping答案:C④Itis________who________goingtoattendthemeetingtomorrow.A.they;is B.I;amC.him;is D.themselves;are答案:B7.强调句型最容易与定语从句、主语从句和状语从句一起考查。一般说来,如果把句子中的Itis/was…that去掉,稍加调整语序,还能复原成完整句子,并且句子意思依然完整,那么为强调句型;否那么,应为其他句式。例如ItwasasmallhousethatIusedtolivein.(定语从句)ItwasattheschoolgatethatImetanoldfriendofmine.(强调句型)[动手练习]①ItwasonOctober1st,1949________NewChinawasfounded.A.which B.whenC.as D.that答案:D②Wasitinthispalace________thelastemperordied?A.that B.inwhichC.inwhere D.which答案:A③Itwasinthcstreet________shemetheroldteacher.A.where B.whichC.that D.when答案:C④Itwassuchaninterestingstory________thefarmertoldusthatday.A.as B.thatC.which D.what答案:A⑤Itwasnotlong________Iforgotitall.A.then B.whenC.after D.before答案:D⑥Itwasthreeyears________hehadbeenastudent.A.since B.thatC.then D.after答案:A⑦Itwillbemanyyears________thechemicalsstarttoescapefromthecontainers.A.after B.beforeC.that D.when答案:B⑧Itwon’tbetenminutes________hefinisheswritingthecomposition.A.when B.beforeC.that D.which答案:B⑨—Whatwasthepartylike?—Wonderful.It’syears________Ienjoyedmyselfsomuch.A.after B.beforeC.when D.since答案:DⅡ.词语讲练1.Lowlyingcountriesfeeltheirveryexistenceisindangerfromrisingsealevels.位于低地的国家感到他们的生存面临来自海平面不断上升的危险。[归纳拓展]existencen.生存;存在v.existcomeintoexistence开始存在;产生inexistence存在的;现存的[背诵句型]Icanfeelyourexistence.我能感觉到你的存在。Pakistancameintoexistenceasanindependentcountryafterthewar.巴基斯坦在战后作为一个独立的国家存在。Thisistheoldesttempleinexistence.这是现存最古老的庙宇。[动手练习]①这个世界是什么时候产生的?Whendidthisworld________?答案:comeintoexistence②这项法律产生于1918年。Thelaw________in1918.答案:cameintoexistence2.Thegreenhouseeffectgivestheearththeaveragetemperatureof15℃.温室效应给与地球外表15℃的平均温度。[归纳拓展]averageadj.平均的;普通的;中等的;一般的n.平均;平均数;平均水平v.算出……的平均数above/belowaverage高于/低于平均水平onaverage平均来看[背诵句型]WhatistheaveragerainfallforJuly?七月份的平均降雨量是多少?Onaverage,babiesstartwalkingatoneyearol
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