Module12SaveourworldUnit3Languageinuse【教学目标】KnowledgeobjectiveTopracticeword-building:compounds,derivatives,conversionAbilityobjectiveEnablestudentstolearnhowtoprotectenvironmentandEarthHour.MoralobjectiveToarousetheawarenessofstudentsprotectingenvironment.【教学重点】Tolearnword-building:compounds,derivatives,conversion【教学方法】PWPmethod,task-basedmethod【教学手段】Ataperecorder,multimediaandsomepictures【教学过程】TeachingProcedures:Step1Languagepractice12
Reusemeans“useagain”.Thoughpollutionisheavynow,Idon’tthinkit’shopeless.Step2Makeanewwords.JointhepartsofwordsinBoxAwiththewordsinBoxB.Youneedtousesomeofthepartsmorethanonce.A–able-fulim--lessre-un-BcarecollecthopepossibleuseusualwantedwasteStep3Nowworkingroups.PlaytheguessinggameEnglishforFun.EnglishforFun1.fullofcare____________2.canbecollected____________3.fullofhope____________4.withoutanyhope____________5.notpossible____________6.notusual____________7.withoutanyuse____________8.useagain____________9.notwanted____________10.makingalotofwaste____________12
Step4LearningtolearnSometimesifyouknowthemeaningofthepartsofaword,youcanworkoutthemeaningofthewholeword.re+new+able;re=again,able=canberenewable=canbenewagainStep5构词法1.合成法将两个或两个以上独立且语义不同的单词合在一起构成新词的方法叫做合成法。合成法是一种比较灵活的构词方法，可以合成名词、形容词、副词、代词、动词等。例如：afternoon,sportsman,blackboard,sportsperson,newspaper,airplane,classmate,grandfather等就是通过合成构词法构成的名词；kind-hearted,middle-aged,hard-working等为合成形容词；however,maybe,himself,everyone,nothing,overlook等也都是通过合成法构成的单词。2.派生法通过在词根前面加前缀或在词根后面加后缀构成一个新词的方法叫作派生法。要通过派生法理解和记忆单词,我们需要掌握常见的前缀和后缀及派生规律。(1)常见前缀12
前缀含义例词dis-不disagree,dislikeen-使……处于某种状态enable,enrichim-,in-不impossible,impatient,inexpensiveinter-在……之间,相互international,interconnectmis-错误地mislead,misunderstandnon-不,非non-smoker,non-nativere-再,重复rewrite,retellun-不unable,unhappy,unpopular(2)常见后缀后缀功能例词-er,-or构成名词teacher,worker,visitor-ianmusician-ingbuilding,painting,shopping,meaning-istartist,scientist-mentagreement,government-nesscoldness,happiness,illness12
-thtruth,warmth-tioncompetition,education,information,invitation-tyactivity,safety-ble,ible构成形容词comfortable,eatable,enjoyable,possible,probable-alenvironmental,international,national,traditional-fulcareful,helpful,useful-iveactive,expensive-lesscareless,helpless,homeless,useless-lyfriendly,lovely,monthly,weekly-ousdangerous,famous-teen构成数词eighteen,fifteen,seventeen-thfifteenth,fifth,fortieth,seventh-tyforty,sixty,twenty-ly构成副词badly,carefully,carelessly,happily,quickly(3)派生规律12
由一个词根加上相应的词缀可以派生出名词、形容词、副词等，掌握派生规律对扩充词汇有很大帮助。例如：由interest可以派生出：uninterestinginterest—interesting—interestinglyinterested—uninterested由help可以派生出：helpless—helplesslyhelp—helpful—helpfully由able可以派生出：enableableunableabilitydisable3.转化法英语构词法中把一种词性转化为另一种词性而词形不变的方法称作转化法。常见的转化有：(1)动词转化为名词—Let’stalkaboutitmore.咱们再谈谈这件事吧。12
—Ithinkwe’dbetterfinishthetalknow.我想我们最好现在结束谈话。(2)名词转化为动词Shegavemeacupofwater.她给了我一杯水。Youshouldwatertheflowerstwiceaday.你应该每天给这些花浇两次水。(3)形容词转化为名词Shewaswearingablackdress.她穿着一条黑色的裙子。Thegirlinblacklooksverybeautiful.那个穿黑衣服的女孩看上去很漂亮。Step6ExercisesCompletethesentenceswiththewordsinthebox.hopefulimpossiblereuseunhealthywasteful1.Pollutedwateris____________.2.Itis_________tothrowsomuchfoodaway.3.Ifyoulookafterthingswell,youmay________someofthemlater.4.Itis___________tocleanupthewholeriverinsuchashorttime.5.Ifwepayattentiontopollutionnow,thefuturewillbe__________.12
Step7Completethetable.NounVerbAdjectiveAdverbuseful/uselesshopehopefully/hopelesslypollution——water————waste————usually/unusuallyStep8CompletethesentenceswiththecorrectformofthewordsinActivity3.Shewashopefulthathernewjobwouldmakehermoresuccessful.1.Thefactory___________theriver,andthefishdied.2.Weoftenwalkinthecountryside.Itisa(n)_______activityforus.3.Donotusesomuchwater.Itisvery__________.4.Tokeeptheflowersgrowing,youneedto_________themonceaday.Step9Completethesentences.Alunchboxisaboxthatyoukeepyourlunchin.1.A___________isacardthatyouwriteononesideofandsendtosomeonebypost.12
2.A___________isaroomwhereyouhaveclassesatschool.3.A___________isabookthathasoneormorestoriesforchildren.4.A____________isablackboardthatisusedatschoolforwritingonwithchalk.Step10WorkinpairsLookatthepicturesandanswerthequestions.1.Whatkindsofthingscanberecycled?2.Howcanthesethingsbereused?3.Howdoesthishelptheenvironment?4.Haveyoueverrecycledorusedthingsthatcanberecycled?How?Step11Completetheconversationwiththecorrectformoftheexpressionsinthebox.begoodforthrowawayturnoffworryaboutMike:IhearyouareofftotheCaribbeanforaholiday!Luckyyou!Butaren’tyou_____________thepollutionthatsuchlongplanejourneymaycausefortheenvironment?Ken:Iknow,butwhatcanIdoaboutit?I’vealreadytriedmybesttoprotecttheenvironment.Irecycle.Idon’t____________thingsifIdon’twantthemanymore.I__________thelightswhenIleavearoom.Don’ttellmeIshouldn’ttravelbyplaneanymore!Mike:No,ofcoursenot.Butwecandomoretoprotecttheenvironment.Forexample,wecanhelpkeeptheaircleanbyplantingtrees.Trees______________theenvironment.Inthisway,wecanreducetheharmofpollution.12
Ken:Good!SoIcanenjoymyholiday,andwhenIcomeback,I’llplantsometrees!Mike:That’stheidea!Maybewecanalljoininandstartasmallforest!Step12ListeningListenandcheck(√)thetruesentences.a)Donotthrowawaythingsmadeofglass,plasticandpaper,butrecyclethemwhenpossible.b)Takeabagwhenyougoshopping.c)ItisOKtothrowusedthingsaway.Lookingafterthemtakesalotoftime.d)Turnofflightswhenyoudonotneedthem.e)Rideabikeorwalk,anddonotoftendriveyourcar.f)Papercupsandbottleddrinksmakeourlifeeasier.Wecanusethemasmuchaspossible.Step13Listenagainandcompletethetable.AdviceReasons1.Don’tthrowawaythingsmadeof_________,but_______them.Throwingthingsawayiswasteful.2.__________yourplasticbagswhenyoucanand__________withyouwhenyougoshopping.Plasticbags__________recycle.12
3.Uselesselectricityandoilto_________.4.Don’tleavelightsonand__________.5.________anddonotoftendriveyourcar.Producingelectricityandusingoilmaycause___________.Step14AroundtheworldEarthHourReadthepassageandanswerthequestions.ØWhenisEarthHourheldeachyear?ØWhydopeopleswitchoffthelightsduringEarthHour?ØWhenandwherewasthefirstEarthHourheld?ØWhichcitytakepartintheeventtoday?Step15Moduletask:DiscussingwhatyoucandoaboutpollutionWorkingroups.Decidewhatkindofpollutionyouwanttotalkabout.ØChooseasubjectthatyoucareaboutthemost.Itcouldbewaterpollution,airpollution,etc.ØFindoutmoreinformationaboutyoursubject.Lookituponawebsiteorinabook.Ifyouchooseairpollution,let’swatchavideoaboutairpollutionfromafactory.DoyouknowPM2.5?Let’sknowmoreaboutPM2.5andprotecttheenvironmentfromnow.Step16Discussion12
Discussyoursubject.•Taketurnstosaywhatyouthinkabouttheproblemsandwhatcanbedone.•Listentowhatotherssay.Ifyouagreewithwhattheyhavesaid,say“Iagree”.“That’strue”or“That’sagoodpoint”;ifyoudonotagreewithwhatsomeonesays,say“I’msorry,butIdon’tagree.Ithinkthat…”Step17HomeworkPresentyourgroupideastothewholeclass.12
微信/支付宝扫码支付