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

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