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1、Unit2SavingtheEarthTopic3Whatcanwedoathometoprotecttheenvironment?SectionC课件11. Goonlearning the usageofcompoundsentences withconjunctions.2. Knowaboutthe modern technologieson environmental protection.Teching aims and demands连词and,but,or和while的用法1、表示并列关系，常用连接词and, not only…but also
2、…等2．表示转折，常用连词有but（但是,表示转折）, while（“而,然而”强调对比）等3．表示选择关系，常用连词有or, either…or…等。4、表示因果关系，常用连词有so, for等Fillintheblanksusingbut,and,thoughandwhile.1.Thedoctorstriedtheirbesttosavethepatient’slife,_____failed2.Kangkangcansolvetheproblem,______Ican’t.3.Weboughtherabirthdaypresent,_____sheli
3、keditverymuch.4.Hurryup___you'llbelate.whileandbutorcoalDiscuss the energy resourcesyou have knownwindsunnuclearwaterLookatthepictures.Doyouknowwhattheyare?electicvehiclemaglevtrainbiogasNewwords1.power:能力，力，力量，电力，功率thepowerofspeech语言能力thepowerofvision视力produce power from… 从……获得能量2.
4、causen、原因，起因，动机causeandeffect因果vt、引起，使发生eg:Whatcausedtheaccident?3.acidrain酸雨acidadj:酸的，酸性的4.nuclear energy 核能nuclear adj.核心的，核的，核能的nuclear family核心家庭，小家庭nuclear-powered核动力的5.biogastechnology沼气技术6.animalwaste动物粪便7.renewablbenergy可再生能源8.beusedin……被用在……被动语态结构：be+动词的过去分词9.key主要的10.e
5、lectricvehicles电动车11.German-built德国制造12.atopspeed最高速13.energy-efficient节能Read1aandanswerthefollowingquestions.Whyisn’tcoalagoodmaterial?Whatisthedisadvantageofusingnuclearpower?Whatdoyouthinkofelectriccars?Whatdoyouthinkofthemaglevtrain?Itisverydirtyandcausesacidrain.Nuclearpowercan
6、beverydangerous.Itisquietandquick.Theyareveryefficientandcostverylittletorun.WorkaloneRead1aagainandfilloutthefollowingtable.WaytoproducepowerAdvantageDisadvantagebiogaselectricvehiclemaglevtrainrenewableefficient,cheap,nopollutionquiet,quick,energy-efficient,nopollutionItwillcausea
7、nincreaseinelectricityneeds.muchmoreexpensivethantraditionaltrains.重点及难点连词or,and,but和while的用法1、表示并列关系，常用连接词and, not only…but also…等2．表示转折，常用连词有but（但是,表示转折）, while（“而,然而”强调对比）等3．表示选择关系，常用连词有or, either…or…等。4、表示因果关系，常用连词有so, for等重点重点及难点重点及难点1、nuclear-powered核动力的5、biogastechnology沼气技术6
8、、animalwaste动物粪便7、r
