Unit4GlobalWarming

Part2LearningaboutLanguageⅠ.根據漢語提示，寫出以下句子中的單詞或短語1．He’salwayshada________(傾向)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．Low-lyingcountriesfeeltheirvery________(存在)isindangerfromrisingsealevels.[答案]existence6．Inthefuture________(外部的)spacemightprovideuswithnewenergysources.[答案]outerⅡ.根據課文內容，完成以下句子。1．造成全球變暖的是人為的行為，而不是一個隨意的自然現象。Itis________________thathascausedthisglobalwarming________________arandombutnaturalphenomenon.[答案]humanactivity，ratherthan2．把1957年到1997年之間的大氣層二氧化碳的含量做出精確計算的是一位叫查爾斯·基林的科學家。________________ascientistcalledCharlesKeeling________madeaccuratemeasurementsoftheamountofcarbondioxideintheatmospherefrom1957to1997.[答案]Itwas，who3．________________theburningofmoreandmorefossilfuels________hasresultedinthisincreaseincarbondioxide.(用強調句型)．[答案]Itis，that完全免費,無需注冊,天天更新！Ⅰ.語法講練it的用法(Ⅱ)——it用于強調句型中強調句型是英語中常用句子結構，又是高考中的常見考點，其根本結構為：It＋be＋被強調局部＋that＋句子其余局部。現將其用法歸納如下：1．強調句型中，能夠被強調的句子成分通常為主語、狀語、賓語等，不能用來強調謂語動詞、表語、補語、讓步狀語、條件狀語等。例如ItwasintheparkthatImetmyoldteacheryesterday.(強調地點狀語)ItwasyesterdaythatImetmyoldteacherinthepark.(強調時間狀語)ItwasmyoldteacherthatImetintheparkyesterday.(強調賓語)ItwasIwhometmyoldteacherintheparkyesterday.(強調主語)[動手練習]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．強調句型中，連接詞一般用that，如被強調的局部是人，也可用who/whom，其他一律用that，不能用which，where，when等，即使被強調的是物、時間狀語或地點狀語。例如Itwasatthegatethatwemettheinspectorsthismorning.Itisourheadteacherthat/who/whomweoftenturntoforhelp.Itwaslastnightthatweheldameeting.[動手練習]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．強調結構中，無論被強調的是人還是物，單數還是復數，be動詞一律用單數is/was形式，如果原句的謂語動詞是一般過去時，就用was；是一般現在時，就用is。也可以用“情態動詞＋be”形式。例如：Itwasthefarmersthatlivedahardlifebeforeliberation.ItmightbeyesterdaythatJohnboughtabookforMary.[動手練習]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．強調句型也有疑問句形式，包括一般疑問句、特殊疑問句和反意疑問句。一般疑問句的強調形式，只需將is/was提前，移至句首即可，即：Is/Wasit…that…。特殊疑問句的強調形式，須將陳述句變成一般疑問句，再在句首加上疑問詞，即：疑問詞(被強調局部)＋is/was＋it＋that＋句子其余局部。例如：Wasitlastyearthatthebuildingwascompleted?WherewasitthatyoumetyourEnglishteacher?Itwasthedaybeforeyesterdaythatyoulostthemoney,wasn’tit?[動手練習]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…結構在強調句型中的運用：until引導的時間狀語從句，也可以用在強調句型中，但主要是其否認形式，如用在強調句型中，必須將not前移，寫成Itis/wasnotuntil…that…。例如Itwasnotuntiltheclassbeganthathecamein.ItwasnotuntillastFridaythathefinishedreadingthebook.[動手練習]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．當強調的是主語時，其謂語動詞應和被強調的人或物保持人稱、數的一致。如果被強調的主語是人稱代詞，宜用主格，或用賓格。例如ItisIwhoamgoingtoattendthemeeting.ItwasI/mewhocleanedtheclassroom.[動手練習]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．強調句型最容易與定語從句、主語從句和狀語從句一起考查。一般說來，如果把句子中的Itis/was…that去掉，稍加調整語序，還能復原成完整句子，并且句子意思依然完整，那么為強調句型；否那么，應為其他句式。例如ItwasasmallhousethatIusedtolivein.(定語從句)ItwasattheschoolgatethatImetanoldfriendofmine.(強調句型)[動手練習]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.詞語講練1．Low-lyingcountriesfeeltheirveryexistenceisindangerfromrisingsealevels.位于低地的國家感到他們的生存面臨來自海平面不斷上升的危險。[歸納拓展]existencen．生存；存在v.existcomeintoexistence開始存在；產生inexistence存在的；現存的[背誦句型]Icanfeelyourexistence.我能感覺到你的存在。Pakistancameintoexistenceasanindependentcountryafterthewar.巴基斯坦在戰后作為一個獨立的國家存在。Thisistheoldesttempleinexistence.這是現存最古老的廟宇。[動手練習]①這個世界是什么時候產生的？Whendidthisworld________？答案：comeintoexistence②這項法律產生于1918年。Thelaw________in1918.答案：cameintoexistence2．Thegreenhouseeffectgivestheearththeaveragetemperatureof15℃.溫室效應給與地球外表15℃的平均溫度。[歸納拓展]averageadj.平均的；普通的；中等的；一般的n．平均；平均數；平均水平v．算出……的平均數above/belowaverage高于/低于平均水平onaverage平均來看[背誦句型]WhatistheaveragerainfallforJuly?七月份的平均降雨量是多少？Onaverage，babiesstartwalkingatoneyearol