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高中英语人教新课标选修6教案:Unit4 Global warming Period 2

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Period2 LanguageStudy教学内容分析   Theemphasisofthisperiodwillbeplacedontheimportantnewwords,phrasesandsentencepatternsinWarmingUp,Pre-reading,Reading,ComprehendingandDiscoveringusefulwordsandexpressionsinLearningaboutLanguage.Therearealtogether53newwordsandphrasesinthesefiveparts.20ofthemaremarkedwithtriangles,whichshowsthatthestudentsneedn'tlearnthembyheart.Itisenoughtorecognizethemwhenmeetingthemwhilereadingthepassage.Theother33shouldallberemembered,amongwhichthefollowingwordsandexpressionsareevenmoreimportant:tend,range,subscribeto,goup,widespread,state,glance,steady,tendency,keepon,onthewhole,quantityof,beopposedto,comeabout,resultin,evenif.Theyareallveryusefulandimportant.Soarethesentencepatterns“...itisarapidincreasewhencomparedtoothernaturalchanges.”and“Thereisnodoubtthattheearthisbecomingwarmer...”Weoughttopaymoreattentiontothem.三维目标设计   Knowledgeandskills1.Togetthestudentstolearntousethefollowingimportantnewwordsandphrasesfreely:tend,range,subscribeto,goup,widespread,state,glance,steady,tendency,keepon,onthewhole,quantityof,oppose,comeabout,resultin,evenif.2.Togetthestudentstounderstandandusethefollowingimportantandusefulsentencepatterns:(1)...itisarapidincreasewhencomparedtoothernaturalchanges.(2)Thereisnodoubtthattheearthisbecomingwarmer...Processandmethods1.Tohelpthestudentstounderstandthemeaningsoftheaboveusefulnewwordsandexpressionsinthecontext,andthengivesomeexplanationsaboutthem,andatlastoffersomeexercisestomakestudentsmastertheirusages.2.Toaskthestudentstomakeuptheirownsentencesbyimitatingtheabovesentencepatterns.3.Attheendoftheclass,makestudentsdomoreexercisesforconsolidation.Indoingso,theycanlearn,graspandusetheseimportantlanguagepointswell.Emotion,attitudeandvalue1.Tostimulatestudents'interestinlearningEnglish.2.Todevelopstudents'senseofcooperationandteamwork.教学重、难点   1.Importantnewwordsandexpressions:quantityof,oppose,comeabout,resultin,evenif.2.Importantandusefulsentencepatterns:(1)...itisarapidincreasewhen_compared_toothernaturalchanges.(2)There_is_no_doubt_thattheearthisbecomingwarmer...3.Somedifficultandlongsentencesinthetext.10,Step1 Revision1.Checkthehomeworkexercises.2.Asksomestudentstotalkaboutglobalwarming.Step2 ReadingandfindingGetstudentstoreadthroughWarmingUp,Pre-reading,Reading,ComprehendingandDiscoveringusefulwordsandexpressionsinLearningaboutLanguagetounderlineallthenewwordsandusefulexpressionsorcollocationsintheseparts.Readthemaloudandcopythemdownintheexercisebook.Step3 Practiceforusefulwordsandexpressions1.TurntoPage28.GothroughtheexercisesinDiscoveringusefulwordsandexpressionswithstudentsandmakesuretheyknowwhattodo.2.Givethemseveralminutestofinishtheexercises.Theyfirstdothemindividually,andthendiscussandcheckthemwiththeirpartners.3.Checktheanswerswiththewholeclassandexplaintheproblemstheymeetwherenecessary.Step4 VocabularystudyⅠ.简单知识扫描1.tend(P26)【原句再现】Itmeansthatmoreheatenergytendstobetrappedintheatmospherecausingtheglobaltemperaturetogoup.这意味着更多的热量被困在大气层中,从而引起全球温度上升。【观察探究】(1)Wesometimestendtothinkthattheoceanbottomismadeupofsmoothplains.我们往往误以为海底由平坦的平原构成。(2)Peopleunderstresstendtoexpresstheirfullrangeofpotential.处于压力下的人容易发挥自己全部的潜力。(3)Doctorsandnursestended(to)theinjured.医生和护士护理受伤的人。【归纳总结】tendvi.&vt.意思是“往往会,趋于,倾向;照料,护理”。作“照料,护理”讲时,常与介词to搭配。【即景活用】(1)救护车上的救护人员在照料受伤的工人。Ambulancecrews______theinjuredworkers.(2)男孩往往比女孩个子高。Boys______tallerthangirls.Suggestedanswers:(1)weretending(to) (2)tendtobe2.range(P27)10,【原句再现】...itwillencourageagreaterrangeofanimals—allofwhichwillmakelifeforhumanbeingsbetter.这将促进动物的生长——所有这一切都会使人类的生活变得更好。【观察探究】(1)Maybethequestionisbeyondtherangeofhumanunderstanding.或许这个问题超越了人类理解的范围。(2)Youcanseearangeofmountainsstandingonthetopofthetower.站在塔顶你可以看到一系列山脉。(3)Thetemperaturerangesbetweentenandthirtydegrees.气温在十至三十度之间。(4)Irangedthebooksontheshelfby/accordingtosize.我把书依大小顺序排在书架上。【归纳总结】rangen.意思是“范围;射程;山脉;行列”;v.意思是“变化;排列;归类于”,常用于rangefrom...to...结构,意为“从……到……范围内变化”。【即景活用】有年龄从七岁到十四岁的两百个男孩。Therearetwohundredboys______________.Suggestedanswer:rangingfromseventofourteeninage3.subscribeto(P26)【原句再现】Allscientistssubscribe_totheviewthattheincreaseintheearth'stemperatureisduetotheburningoffossilfuelslikecoal,naturalgasandoiltoproduceenergy.所有科学家都赞同这样的观点:人们为了生产能量而燃烧化石燃料(如煤、天然气、石油等),从而引起了地球温度的升高。【观察探究】(1)Thechildreneachsubscribed5pencetobuyapresentforNickinhospital.孩子们每人出五便士为住院的尼克买礼品。(2)Allthepeoplepresentsubscribetotheopinionputforwardbythechairman.参加会议的人全部同意主席提出的意见。(3)Ihavesubscribedtothatmagazineforyears.我订阅那本杂志已好几年了。【归纳总结】subscribeto的意思有“捐款;捐助;同意,赞同;订购(报纸、杂志等)”等。【即景活用】Thegovernmentcalledonallthecitizensto______arelieffund.A.subscribeto    B.agreeto    C.amountto    D.shifttoSuggestedanswers:A4.goup(P26)【原句再现】Itmeansthatmoreheatenergytendstobetrappedintheatmospherecausingtheglobaltemperaturetogo_up.这意味着更多的热量被困在大气层中,从而引起全球温度上升。10,【观察探究】(1)Theelevatorwentuptothefourthfloor.电梯升到了四楼。(2)Asyougoupamountain,youhavetoovercometheearth'sgravitywhichpullsyoudown.上山时你必须克服把你往下拉的地球引力。(3)Pricesoffruitandvegetableshavegoneup.水果和蔬菜的价格上涨了。【归纳总结】动词短语goup的意思有“升;攀登;向上去,沿(街)而去;涨价”等。类似意义的词还有rise,increase等。其反义词是:godown,falldown,decrease。【即景活用】(1)物价又上涨了。Prices______again.(2)到处都盖起新的大楼。Newbuildings______everywhere.[来源:学科网ZXXK]Suggestedanswers:(1)havegoneup (2)aregoingup5.keepon(P27)【原句再现】Evenifwestartreducingtheamountofcarbondioxideandothergreenhousegases,theclimateisgoingtokeep_onwarmingfordecadesorcenturies.尽管我们已经开始减少二氧化碳和其他温室气体的排放量,但是在未来的几十年或几个世纪里气候将会持续变暖。【观察探究】(1)Theairplanekeptonflyingatahighaltitude.这架飞机持续在高空飞行。(2)Hekeptonsmokingafterthedoctortoldhimtostop.医生劝告他戒烟,可他仍继续抽。(3)Heiskeepingonthehouseinhishometown.他把家乡的那所房屋保留着。(4)Keepstraightonandyou'llcometothemarket.一直往前走就到市场。(5)Ihavefailedseveraltimes,butIstillkeepon.我已经失败了好几次,但我仍然坚持下去。【归纳总结】keepon意为“继续(做某事);不顾困难、反对或警告而坚持(做某事);继续前进,继续工作”等。【即景活用】EvenifIfailagain,Iwill______workingharduntilIsucceed.A.giveupB.turntoC.keeponD.thinkofSuggestedanswer:C6.onthewhole(P28)【原句再现】On_the_wholethewarmingoftheearthisaphenomenonthatcausesgreatconcern.大体上,地球变暖是一种引起巨大关注的现象。【观察探究】Theweatherthismonthhasbeengoodonthewhole.这个月的天气基本上是好的。Livingintownispleasantbut,onthewhole,Ilikethecountrybetter.10,住在城里是愉快的,但是,总的来看,我更喜欢农村。【归纳总结】onthewhole意为“总的看来;大体上;基本上”,相当于ingeneral,mostly,可位于句首、句中或句尾。【即景活用】翻译句子总的看来,我认为他那样做是对的。Suggestedanswer:Onthewhole,Ithinkhewasquiterighttoactashedid.Ⅱ.重点知识探究1.oppose(P27)【原句再现】Ontheotherhand,therearethose,likeGeorgeHambley,whoareopposedtothisview,believethatweshouldnotworryabouthighlevelsofcarbondioxideintheair.另一方面,像乔治·汉布利那些人,他们反对这种观点,认为我们不应该为空气中二氧化碳含量高担心。【观察探究】Manymembersofthecouncilopposedthebuildingoftheluxuryhousesinthecentreofthecity.许多市议会议员反对在市中心建造豪华型住宅。[来源:学科网ZXXK]Manyresidentsareopposedtotheplanofbuildingthemotorway.许多居民反对修建那条高速公路的计划。【归纳总结】opposevt.&vi.意为“反对;使对立;使对抗;抗争”,后面可直接跟名词作宾语,也可用于beopposedto(doing)sth.结构。【词汇辨析】oppose,object和resist三者都含有“反对”的意思,但是用法有区别。oppose为常用词,指“对某人、某事采取积极行动来反对”,着重动作,尤指“反对一种观念、思想、计划等”。如:Thefatheropposedtohisson'smarriage.父亲反对儿子的婚事。object常指“用言论或论据等表示反对”,着重“个人嫌厌”和“(由于与个人有关因此)提出反对意见”。如:[来源:学.科.网]Iobjectedtohisplan.我反对他的计划。resist指“积极地反抗、对抗;用武力阻止……的前进”,如:Thevillagerswereunitedtoresisttheenemy.村民们团结起来抵抗敌人。【即景活用】我们坚决反对在国与国之间实行强权政治。We______firmly______thepracticeofpowerpoliticsbetweennations.Suggestedanswers:are;opposedto2.comeabout(P26)【原句再现】Sohowhasthiscome_aboutanddoesitmatter?这种情况是怎么发生的,有什么影响?【观察探究】10,Withtheuseofelectricity,greatchangeshavecomeabout.随着电的使用,种种大变化发生了。Theaccidentcomesaboutinthisway.这事故就是这样发生的。Manyaquarrelhascomeaboutthroughamisunderstanding.许多争执都是由于误会产生的。【归纳总结】comeabout意为“发生,造成”,有时用it作主语,后面跟that引导的从句。【词汇辨析】comeabout与happen,occur,takeplace的异同。comeabout与happen,occur,takeplace同义。takeplace常指经过安排的。happen指“偶然发生”,等于occur。happento+v.意为“偶然/碰巧做出”。Ithappens/happenedthat-clause...碰巧……occur/happen+to(prep.)...发生在……occur+to(prep.)...想起……Itoccur(-s/-ed)(tosb.)+todosth./that-clause想起,想到【即景活用】同义句转换Shehappenedtobeoutwhenhecalled.A:It______thatshe________________________whenhecalled.B:She______nottobe______whenhecalled.C:It____________shewasnotathomewhenhecalled.[来源:学科网]Suggestedanswers:A:happened;wasnotathome B:happened;home C:cameabout3.resultin(P26)【原句再现】Theyalsoagreethatitistheburningofmoreandmorefossilfuelsthathasresulted_inthisincreaseincarbondioxide.他们还一致认为,正是因为越来越多的化石燃料的燃烧才导致了二氧化碳的增长。【观察探究】Thesemeasuresresultedinagreatvictory.由于采取了这些措施,打了一个大胜仗。Theplotresultedinfailure.阴谋以失败告终。【归纳总结】resultin的意思是“产生,导致”,与cause或leadto同义,其主语是起因;in的宾语是结果。resultfrom的意思是“由……引起,产生”,与liein,asaresultof和becauseof同义,其主语是结果,from的宾语是起因。【即景活用】同义句转换(1)Hisfailureresultedfromnotworkinghardenough.Notworkinghardenough____________hisfailure.(2)Hissicknesswascausedbyeatingtoomuch.A.Hissickness____________eatingtoomuch.B.Hewasill______heatetoomuch.C.________________________eatingtoomuch,hewasill.Suggestedanswers:(1)resultedin (2)resultedfrom;because;Asaresultof10,4.quantitiesof(P26)【原句再现】Theproblembeginswhenweaddhugequantities_ofextracarbondioxideintotheatmosphere.当我们把大量额外的二氧化碳排入大气层的时候,问题就出现了。【观察探究】(1)Quantitiesoffood(nuts)wereonthetable.桌子上有许多食品(坚果)。(2)Greatquantitiesofsandwerewasheddownthehillsidebytherain.雨水把大量的泥沙冲下山坡。(3)Hecollectedquantities(aquantity)ofoldpictures.他收集了大量的旧画。(4)Thereisonlyasmallquantityofwineleft.只剩下很少一点酒了。【归纳总结】quantitiesof=aquantityof,意为“大量的”,既可以修饰可数名词,也可以修饰不可数名词。quantitiesof无论修饰可数还是不可数名词,后面的谓语动词都用复数。另外,quantity前面还可以加修饰成分,构成的短语有acertainquantityof(一定数量的),alarge(great,good)quantityof(大量的),asmallquantityof(少量的……),large(great,good)quantitiesof(大量的),smallquantitiesof(少量的……)。【知识拓展】(1)quantity量,数量。如:Withoutquantitytherecanbenoquality.没有数量就没有质量。Thegovernmenthasbeenbuyingsilveringreatquantities.政府一直在大量购进白银。(ingreat/smallquantities意为“大/少量”,用作状语。)(2)表示“大量的”时,可用以下形式:①修饰可数名词many,agreat/largenumberof,great/largenumbersof,agood/greatmany(后面没有of),manya(后接单数名词,其谓语动词也用单数形式)②修饰不可数名词much,agreat/largeamountof,great/largeamountsof,agreat/gooddealof③既可以修饰可数名词,也可以修饰不可数名词alotof=lotsof,aquantityof=quantitiesof,amassof=massesof,plentyof(前面没有a)▲这些短语均常被形容词修饰,如:alargenumberof,asmallamountof,agreatquantityof。▲quantitiesof/amountsof+不可数名词+复数动词;alotof/lotsof/plentyof+不可数名词+单数动词。▲inamount/amounts/quantity/quantities/number意为“在数量上,大量地”。【即景活用】(1)Weaimatqualityratherthan______.A.numberB.amountC.figureD.quantity(2)Withmoreforestsbeingdestroyed,hugequantitiesofgoodearth______eachyear.A.iswashingawayB.isbeingwashedawayC.arewashingawayD.arebeingwashedaway10,Suggestedanswers:(1)D (2)D5.evenif(P27)【原句再现】Even_ifwestartreducingtheamountofcarbondioxideandothergreenhousegases,theclimateisgoingtokeeponwarmingfordecadesorcenturies.尽管我们已经开始减少二氧化碳和其他温室气体的排放量,但是在未来的几十年或几个世纪里气候将会持续变暖。【观察探究】Evenifitrainedheavily,westillmarchedon.即使大雨倾盆,我们还是继续前进。Evenifyouareagoodhigh-jumper,youjumpnomorethanthreemeters.即使是个优秀的跳高运动员,你也跳不过三米。Weshallgo,evenifitrains.就是下雨,我们也要去。【归纳总结】evenif有“虽然、即使、尽管”的意思,引导让步状语从句,可以与eventhough互换,语气比although和though强,可以放在主句前面也可以放在主句后面。【知识拓展】though,although引导让步从句的用法:though,although引导让步从句时,后面的从句不能有but,但是可以用yet。如:Althoughit'sraining,theyarestillworkinginthefield.虽然在下雨,但他们仍在地里干活。Heisveryold,buthestillworksveryhard.虽然很老了,但他仍然努力地工作。Thoughthesorebehealed,yetascarmayremain.伤口虽愈合,但伤疤留下了。(谚语)【即景活用】(1)We'llmakeatrip______theweatherisbad.A.asforB.evenifC.becauseofD.aslongas(2)______sheisyoung,sheknowsquitealot.A.WhenB.HoweverC.AlthoughD.UnlessSuggestedanswers:(1)B (2)CⅢ.词汇综合运用1.用括号中所给的单词或短语翻译下列句子。(1)即使一个工人持续工作三十余年,他依然买不起房。(evenif)(2)总起来说,中国的房价太高。而且房价还在持续增长。(onthewhole;tend;keepon)(3)他们坚决要求把房价控制在一定的范围内。(range)(4)尽管政府已经采取了一些措施,但是房价依然在上涨,这导致了许多问题。(although;goup;resultin)(5)许多人想知道这是如何造成的。(comeabout)(6)他们反对政府采取的一些措施。(oppose)Suggestedanswers:(1)Evenifaworkerworkscontinuallyformorethanthirtyyears,hestillcan'taffordahouse.(2)Onthewhole,thepriceofhousesinChinaistoohigh.Andittendstokeeponrising.10,(3)Theyinsistthatthepriceofhousesshouldbecontrolledwithinarange.(4)Althoughthegovernmenthastakensomemeasures,thepriceofhousesisstillgoingup,whichhasresultedinmanyproblems.(5)Manypeoplewanttoknowhowitcomesabout.(6)Theyopposesomemeasurementstakenbythegovernment.2.连句成篇(按照一定的逻辑顺序适当调整句子的顺序,把上面的句子连成一篇小短文,必要时增加适当的连词。)________________________________________________________________________________________________________________________________________________Suggestedanswers:Onthewhole,thepriceofhousesinChinaistoohigh.Andittendstokeeponrising.Althoughthegovernmenthastakensomemeasures,thepriceofhousesisstillgoingup,whichhasresultedinmanyproblems.Evenifaworkerworkscontinuallyformorethanthirtyyears,hestillcan'taffordahouse.Manypeoplewanttoknowhowitcomesabout.Theyopposesomemeasurementstakenbythegovernmentandinsistthatthepriceofhousesshouldbecontrolledwithinarange.Step5 Sentencefocus1....butitisarapidincreasewhen_compared_toothernaturalchanges.(P26)……但是,同自然界的其他变化相比,这种升高是迅速的。这是一个省略句,补全之后是...butitisarapidincreasewhenitiscomparedtoothernaturalchanges。一般说来,省略现象多出现在下列五种状语从句中:(1)由when,while,as,before,after,till,until,once等引导的时间状语从句;(2)由whether,if,unless等引导的条件状语从句;(3)由though,although,evenif,whatever等引导的让步状语从句;(4)由as,than等引导的比较状语从句;(5)由as,asif,asthough等引导的方式状语从句。上述状语从句在省略时,并非任何成分都可以省略,而是遵循以下原则:[来源:学#科#网Z#X#X#K](1)当状语从句的主语与主句的主语一致时,可以省略状语从句的主语和系动词be,这时从句中可出现如下结构:①连词(as,asif,once)+名词。如:Once(hewas)aworker,PangLongnowbecomesafamoussinger.庞龙曾经是个工人,现在成了一位著名的歌手。②连词(though,whether,when)+形容词。如:Workhardwhen(youare)young,oryou'llregret.趁年轻要努力学习,要不然你会后悔的。③连词(whether,asif,while)+介词短语。如:Helookedeverywhereasif(hewas)insearchofsomething.他到处看似乎在找什么东西。④连词(when,while,though)+现在分词。如:While(hewas)holdingtalkswithPresidentHuJintao,USPresidentGeorgeW.BushthankedChinaforitsimportantroleintheSix-PartyTalks.在与胡锦涛主席会谈时,美国总统布什感谢中国在六方会谈中起的重要作用。10,⑤连词(when,if,evenif,unless,once,until,than,as)+过去分词。如:Theexhibitionismoreinterestingthan(itwas)expected.这次展览比被预料的有趣得多。⑥连词(asif,asthough)+不定式。如:OlympicgoldmedalisthurdlerLiuXiangopenedhislipsasif(hewere)tospeak.奥林匹克金牌获得者跨栏运动员刘翔张开嘴,好像要说什么。(2)当从句的主语是it,谓语动词中又含有系动词be时,可以把it和系动词be一起省略。此时构成连词(if,unless,when,whenever)+形容词的结构。如:Unless(itis)necessary,you'dbetternotrefertothedictionary.如果没有必要,你最好不要查字典。2.There_is_no_doubt_thattheearthisbecomingwarmer...(P26)毫无疑问地球正在变暖……在Thereisnodoubt后常可跟that引导的同位语从句(在肯定句中,doubt后面有时可跟whether引导的从句)。Thereisnodoubtthatyouwillsucceedifyoutryyourbest.毫无疑问如果你尽最大努力你一定会成功。Thereisnodoubtthathewillcomeontime.他一定会准时来。类似常用结构:Thereisnoknowing/telling...没法知道/说……Thereisnoneed...没有必要……Thereisnoquestion...……是没有问题的。Thereisnoreason...没有理由……Thereisnopossibilitythat...……是没有可能的。Itisno/smallwonderthat...(Nowonderthat)...难怪……Itisawonderthat...……真奇怪/真是令人惊奇。Step6 Homework1.FinishofftheWorkbookexercises.DoExercise1inUsingWordsandExpressionsinyourexercisebook.2.Learntheusefulnewwordsandexpressionsbyheart.Step7 Reflectionafterteaching________________________________________________________________________________________________________________________________________________10

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