Unit 13 We’re trying to save the earth! 教学案例.doc

Unit 13 Were trying to save the earth! 教学案例语言目标；industry,law,scientific,afford,reusable,transportation,recycle,napkin,upside,gate,bottle,president,inspiration,iron,work,metal,creativity,基本词组：beharmfulto,atthetop(ofsth.),takepartin,turnoff,takeaction,throwaway,putsth.togooduse,pulldown,bringback基本句型：Weretryingtosavetheearth!Theriverusedtobesoclean.Theairisbadlypolluted.Noscientificstudieshaveshowedthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.2.技能目标:能正确运用现在进行时，现在完成时，被动语态，情态动词和usedto句型。3.情感目标:有环境危机意识，学会关注环境保护环境。二、教学重难点：1.教学重点：（1）能正确运用现在进行时，现在完成时，被动语态，情态动词和usedto句型。（2）保护环境的措施方法。2.教学难点：能正确运用现在进行时，现在完成时，被动语态，情态动词和usedto句型。三、教学步骤:SectionA1(1a-2d)I.PresentationShowthepictureoftheearthandtellstudentstheearthispollutednow.Forexample:(1)Thefactoriesthatburncoalpollutetheairwithalotofblacksmoke.(2)Factoriesputwasteintotheriver.(3)Peopleshouldthrowawaylitterinthebin.(4)Therearemorecarsontheroad.II.LearningHerearesomewordsrelatedtodifferentkindsofpollution.Writethemintheboxbelow.Thenaddmorewords.loudmusiccarsrubbishplaneslitteringshipsfactoriessmokingbuildinghousesmobilephonesnoisepollutionairpollutionwaterpollution_Keys:noisepollutionloudmusicplanesmobilephonesbuildinghousesairpollutionfactoriessmokingcarsbuildinghouseswaterpollutionshipsrubbishlitteringfactoriesIII.Listening1.1bListenandcompletethesentences.Whatwastheproblem? Theriverwas_.Eventhebottom(底部)oftheriverwasfullof_.Therewerenomore_forfishermen(渔民)tocatch.Whatcausedtheproblem? Peoplearethrowing_intotheriver.Factoriesareputting_intotheriver.Howshouldtheproblembesolved?Weshouldwritetothe_andaskthemto_thefactories.Everyoneshouldhelpto_theriver.Keys:reallydirtyrubbishfishlitterwastegovernmentclosedowncleanup2.Listenagainandcheck()thesentencesyouhear.1)Wecouldgofishingintheriver.2)Theriverwasreallydirty.3)Theriverhasalwaysbeenthenicestriverinthistown.4)Weshouldasktheteachersforhelp.Keys:23IV.Practice1.Role-playtheconversationin1c.Mark:Theriverwasdirty.Eventhebottomoftheriverwasfullofrubbish.Tony:Butitusedtobesoclean!Mark:Yes,butpeoplearethrowinglitterintotheriver.Tony:Everyoneinthistownshouldplayapartincleaningitup!2.Makeconversationsusingthepollutionin1a.A:Theriverhasalwaysbeenthenicestriverinthistown.B:Yes,itusedtobesoclean.A:ButIwastherelastweekendandtheriverwasreallydirty.B:Whatcausedtheproblem?A:Peoplearethrowinglitterintotheriver.B:Whatshouldwedo?A:Factoriesarealsoputtingwasteintotheriver.B:Yes,everyoneinthistownshouldplayapart.A:Weshouldwritetothegovernmentandaskthemtoclosedownthefactories.B:Whatelsecanwedo?A:Everyoneshouldhelptocleanuptheriver.V.Languagepoints1.Weretryingtosavetheearth!我们正在竭尽全力拯救地球!trytodo=tryonesbesttodo努力去做某事。e.g.Everystudentshouldtrytostudyhardinordertostudyinauniversity.为了进入大学学习，每个学生都应该努力学习。2.Herearesomewordsrelatedtodifferentkindsofpollution.berelatedto与有关e.g.Iamnotrelatedtohiminanyway.我和他无任何关系。3.Everyoneinthistownshouldplayapartincleaningitup!playapartin在方面起作用e.g.Agooddietplaysalargepartinhelpingpeoplelivelonger.健康的饮食在帮助人们长寿方面起着非常大的作用。playapart在中扮演角色e.g.HewasinvitedtoplayapartinthisTVplay.他被邀请参加这个电视剧的演出。4.Eventhebottomoftheriverwasfullofrubbish.Yes,butpeoplearethrowinglitterintotheriver.litter和rubbish都可指“垃圾”，用作不可数名词。rubbish指“没用的东西(被扔或将要丢弃的无用的东西)”不可回收。litter指“(室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等)”还可回收e.g.Throwtherubbishout.把垃圾扔出去。Theroomisfullofrubbish.房间里堆满了垃圾。Pickupyourlitterafterapicnic.野餐后将废弃物收拾好。VI.Listening1.2aListentotheinterview.CirclethekindsofpollutionthatJasonandSusantalkabout.A.landpollutionB.airpollutionC.noisepollutionD.waterpollutionKeys:BA2.2bListenagainandcompletethesentences.1)Theairisbadlypollutedbecausethereare_ontheroadthesedays.2)Factoriesthatburncoalalso_theairwithalotofblacksmoke.3)Thereisalsotoomuchrubbishandwaste.People_thingseveryday.4)Peoplearealsolitteringin_likeparks.Thisisturningbeautifulplacesintougly(丑陋)ones.Keys:morecarspollutearethrowingawaypublicplaces3.Listenandanswerthequestions.1)Whoistheinterviewertalkingto?2)Whataretheytalking?3)Whatotherproblemsdotheysee?Keys:SusanandJason.Theenvironmentalproblems.Therestoomuchrubbishandwasteinthestreets.VII.Practice(2c)Usetheinformationin2aand2btorole-playconversationsbetweenJasonandSusan.Jason:Theairhasbecomereallypollutedaroundhere.Imgettingveryworried.Susan:Yes,Iusedtobeabletoseestarsinthesky.Jason:TheproblemisthatVIII.DiscussionAskstudentswhatweshoulddotosavetheearth.Helpstudentsanswer,turnoffthelightswhenyouleavearoom;stopridingincars;stopusingpapertowelsornapkins;recyclebooksandpaper.IX.Reading1.Read2dandcompletethechart.Problems Solvingproblemsairpollution wastepollution wooden(木头的)chopsticksorplasticforks rubbish 2.Role-playtheconversation.Interviewer:JasonandSusan,whatareyourideasforsolvingtheseproblems?Jason:Well,tocutdownairpollution,weshouldtakethebusorsubwayinsteadofdriving.Susan:Yeah,orrideabike.Thereareotheradvantages(优点)ofbikeriding.Itsgoodforhealthanditdoesntcost(花费)anything!Interviewer:Greatideas!Whataboutwastepollution?Susan:Mmm,Ithinksimplethingslikebringingabagtogoshoppingcanhelp.Istarteddoingthatayearago.Jason:Me,too.Also,Inevertakewoodenchopsticksorplastic(塑料)forkswhenIbuytakeaway(外卖食品)food.Iusetheonesathome.Susan:Andremembertothrowrubbishinthebinsandkeeppublicplacescleanandbeautifulforeveryone.Interviewer:Sotogether,ouractionscanmakeadifferenceandleadtoabetterfuture!X.Summaryandlanguagepoints1.Thisisturningbeautifulplacesintouglyones.turninto把变成e.g.Theicyrainseemedliketoturnintosnow.渐渐地冻雨又变成雪花的模样。2.Itsgoodforhealthanditdoesntcostanything!costv.花费；使付出指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。e.g.ThenewshirtcostMrWang200yuan.王先生花了200元买了新衬衫。Howmuchdoesthenewcomputercost?新电脑花了多少钱？take,spend,pay&costtake，spend，pay和cost都可以表示“花费”，但它们的用法各有不同。1)take多表示花费时间，常用于Ittakessb.sometimetodosth.这一句型中，其中it作形式主语。e.g.Itusuallytakesme40minutestocookthedinner.2)spend多表示花费时间和金钱，主语通常是人，常用于sb.spend(s)sometime/moneyonsth.和sb.spend(s)sometime/money(in)doingsth.两种句型。e.g.Davidspent2,000yuanonthenewmachine.Myfatherspendsanhour(in)watchingthenewsonTVeveryday.3)pay多表示花费金钱，主语通常是人，常用于sb.pay(s)somemoneyforsth.句型。e.g.Tommypaid20yuanforhisbreakfastyesterday.4)cost多表示花费金钱，主语通常是物，常用于sth.cost(s)(sb.)somemoney.句型。e.g.ThenewdresscostLinda88yuan.根据句意用take,spend,pay或cost的适当形式填空。1)Thatnewcar_themlotsofmoney.2)Mona_50yuanonthebooksjustnow.3)Itusually_meanhourtodomyhomework.4)Youshould_sometimepractisingyourpronunciation.5)Mybrother_6,000yuanforthenewcomputeryesterday.Keyscostspenttakesspendpaid3.Sotogether,ouractionscanmakeadifferenceandleadtoabetterfuture!makeadifference(to)表示(对)产生影响或作用e.g.Doyouthinkhiswordswouldmakeanydifferencetothefinaldecision?你认为他的话会对最后的决定产生影响吗？ThenewteacheralwaysencourageslittleTom.Thishasmadeabigdifferencetohim.新来的老师总是鼓励小汤姆，这对他影响很大。XI.Exercises用动词的适当形式填空。1)Weretrying_(save)theearth.2)Thereusedto_(be)cleanandbeautiful.3)Therearetoomany_for_tocatch(fish).4)Itsbadforenvironmenttouse_(wood)chopsticks.Keys:tosavebefishfishermenwoodenXII.ThinkaboutTheearthisbadlypolluted.Pleasemakeaposterandthinkofwhatwecando.XIII.Homework1.Copythenewwordsandrememberthem.2.Readthelisteningmaterialsof1b,2a.SectionA2(3a-3c)I.Revision(1)Role-play2d.(2)TranslatethesesentencesintoEnglish.甚至是河底都满是垃圾。这个小镇上的每个人都应该参加打扫。骑自行车有其它的优点。我买外卖食品从来不拿木筷子和塑料叉子。II.Leadin(1)Teachertellsstudentstheearthisbadlypolluted.Whatshouldwedotosavetheearth?Letstakeaction.Forexample:Turnoffthelightswhenyouleavearoom;TakebusesinsteadofdrivingcarsRecyclebooksandpaper.(2)Therearesomeanimalsareendangered.Weshoulddosomethingtoprotecttheanimalsandtheenvironment!III.Discussion(1)Haveyoueverseenashark?(2)Whatdoyouknowaboutsharks?IV.Reading(1)Sharksareendangered,readthepassageandjudgethesentences.Sharksfin（鱼鳍）soupisfamousandexpensiveallaroundtheworld.Wehavetokillawholesharktogetabowlofsharksfinsoup.Peoplecutoffsharksfinsandthrowthesharksbackintotheocean.Sharksareinthebottomofthefoodchainintheoceansecosystem.WildAidandtheWWFareenvironmentalprotectiongroupsinChina.Sharksfinsaregoodforhealth.(2)Completethefactsheetin3a.Wheresharkfinsoupispopular Numberofsharkscaughtandtradedeveryyear Howmuchthenumbersofsomekindsofsharkshavefalleninthelast20to30years Twoenvironmentalgroupswhichareagainst“finning” V.Practice(3b)(1)Readthepassageanddillintheblankswiththewordsinthebox.1.Manypeopledonotrealizetheyarekillingawholeshark_theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,_iftheirnumbersdrop,theoceansecosystemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,_theyarewrong.4._therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday_wedonotdosomethingtostopthesaleofsharkfins.(2)Retellthepassageaccordingtothewordsbelow.sharksfinsoup,insouthernChinaeachtimecutoffnolongernotonlybutalsoatthetopdropbeendangeredthestrongestaround70millionfallenbyover90percentWildAidandtheWWFdeveloplawsscientificstudiesVI.Languagepoints1.Asharkcannolongerswimandslowlydies.鲨鱼不能再游泳然后慢慢死掉。nolonger意思是“不再”e.g.Imnolongerastudent.我不再是个学生了。有两个短语和nolonger同义，即notanylonger和notanymore，但他们侧重的方面不同。nolonger和notanylonger侧重时间。e.g.Henolongerliveshere.=Hedoesntlivehereanylonger.他不在这儿居住了。(一个时间以前他住在这儿，过了这个时间，他就离开了。)notanymore侧重侧重程度和数量e.g.Youcandrinknomore.=Youcantdrinkanymore.你不能再喝了。(喝酒的量到了一定程度，不能再继续下去了。)2.Thismethodisnotonlycruel,butalsoharmfultotheenvironment.这种方法不但残忍而且对环境有害。notonlybutalso用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅而且”;其中的also有时可以省略。e.g.1)Shenotonlyplayswell,butalsowritesmusic.她不仅很会演奏，而且还会作曲。2)Notonlymenbutalsowomenwerechosen.不仅仅是男的，女的也有被选中的。若连接两个成分作主语，其谓语通常与靠近的主语保持一致。e.g.Notonlyyoubutalsohehastoleave.不只是你，他也得离开。notonly放在句首，后接句子时要用倒装结构。e.g.Notonlyhadthepoormanbeenfined,butalsohehadbeensenttoprison.这个可怜的人不仅被罚款，而且还被送进了监狱。beharmfulto对有害e.g.Smokingisharmfultothehealth.吸烟有损健康。Playingcomputergamesmuchisharmfultostudents.电脑游戏玩太多对学生有害。3.Sharksareatthetopofthefoodchainintheoceansecosystem.鲨鱼位于海洋生物系统食物链的顶部。atthetopof在.最高地位;用最高最大的(速度,声音等)e.g.Ilookedatthetopofhishead,hishairshinyandpartedsmoothly.我看他的头顶,头发光亮,分得平滑。Heshoutedatthetopofhisvoiceinorderthathemightbeheard.他尽力大声叫喊,以便别人能听见。4.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.如果它们的数目降至过低，会给所有海洋生物带来危险。此句复数形式的number表达全海洋中鲨鱼的总量。当表示数值的高或低时，number要用high或low修饰。e.g.Inthatcountry,thenumberofchildrengoingtoschoolishigherincitiesthanintownsandvillage.在那个国家，城市儿童入学人数比乡镇及农村要高。常与number搭配的动词有grow,fall等。e.g.Thenumberoffamiliesthatowncarshasbeengrowingquicklyrecently.近来拥有轿车的家庭数量增长很快。5.Environmentprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicabout“finning”.世界各地的环境保护组织，如野生救援协会和世界自然基金会，都在教育公众有关“猎翅”的行为。1)句中fin本为名词，指“鱼鳍”。此句中的finning由动词化的fin（割鲨鱼鳍以获取鱼翅）的-ing形式转化而成，指课文中所陈述的“猎翅”这一行为。2)WildAid和WWF组织WildAid（美国野生救援协会）是保护野生动物及栖息地环境的一个非盈利性的机构，1999年注册成立，其宗旨是保护及救助世界范围内的野生动物；WWF（世界自然基金会）英文全称为WorldWideFundforNature，成立于1961年，是享有国际盛誉，全球最大的独立性非政府环境保护组织之一。VII.HomeworkWrite5measurestoprotecttheenvironment.SectionA3(GrammarFocus-4c)I.Revision1.Checkifyouknowthesephrases.不同种类的污染河底把垃圾扔到河里在中起作用在中国南部对有害在顶部海洋生态系统2.TranslatethesesentencesintoEnglish.甚至是河底都满是垃圾。这个方法不仅残酷还对环境有害。鲨鱼处于海洋食物链的顶部。许多人相信鱼翅对健康有好处。II.GrammarFocusPayattentiontothesentences.1)Weretryingtosavetheearth.2)Theriverusedtobesoclean.3)Theairisbadlypolluted.4)Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.5)Weshouldhelpsavethesharks.1.现在进行时:PresentProgressive定义：表示说话时（瞬间）正在进行的动作，也表示目前或现阶段一直进行的动作。结构:be(am/is/are)+v.-ing标志词：Look,Listen,now,rightnowe.g.Look!Theboyiscrying.2.usedtodo与beusedtodoingusedtodosth.表示过去常常做某事,而现在往往不做了,后接动词原形。beusedtodoingsth.表示习惯于做某事。e.g.Iusedtogetupatsixoclock.Joeisusedtodrinkingacupofcoffeeeverymorning.3.被动语态：Passivevoice定义：表示主语是动作的承受者，即行为动作的对象的一种语态。结构：be+过去分词e.g.Anewschoolwasbuiltlastyear.Ourclassroomiscleanedeveryday.4.现在完成时:PresentPerfect定义：表示动作已经完成,但对现在造成影响;或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。结构:has/have+过去分词标志词：already,yet,ever,never,since,fore.g.Ihaventfinishedmyhomeworkyet.5.情态动词1)情态动词本身有一定的词义，表示说话人的情绪、态度或语气，但不能单独作谓语，只能与其他动词构成谓语。常见的有：can(could),may(might),must,need,shall(should),will(would)等。2)情态动词无人称和数的变化,后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式,可用来表达更加客气、委婉的语气。e.g.Kencanclimbupthetresslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustntplaywithfire.Itisdangerous.III.Practice1.Workon4a.Fillintheblankswiththecorrectformsoftheverbsinbrackets.Joe:_youever_(take)partinanenvironmentalproject?Eric:Yes,Ihave.I_(help)withaClean-UpDaylastyear.Itwas_(consider)thebiggestclean-upprojectthiscity_ever_(have).Joe:Howmanypeople_(take)part?Eric:I_(think)morethan1,000people_(come)tohelpout.Joe:Thatsfantastic!Iguesseveryoneinthiscityis_(try)toimprovetheenvironment.Eric:Yes,wecantaffordto_(wait)anylongertotakeaction!Learnsomenewwordsandexpressions.2.Workon4b.Fillintheblankswiththeappropriatemodalverbsfromthebox.Thewordsare:can,would,could,havet