牛津译林版九年级英语下册Unit 4 Life on Mars第3课时示范课教学课件

Unit4LifeonMarsReading

(II)牛津译林版九年级英语下册

WhydopeoplewanttomovetoMars?Warming-upThinkandsayTheEarthisbecomingmoreandmorec_________andp__________becausethepopulationisincreasingr__________.SomepeoplewouldliketomovetoM______.Theythinkbytheyear2100ours___________couldcarrylargenumbersofp___________.However,therecouldbemanyproblems.Forexample,couldhumanssurvivewithoutwater,o________orfood?Howwouldpeoplepreventthemselvesfromf________offinspace?WouldtherebeschoolsonMars?Anyway,c_________withlifeontheearth,lifeonMarswouldbeinterestingaswellasc____________.

Fillintheblankswithproperwordsrowdedollutedapidlyars

pacecraftassengersxygenloatingomparedhallengingPre-readingTheEarthisbecomingmoreandmorecrowdedand

polluted

becauseoftherapidincreaseinpopulation.1.WhywillweleaveourownplanettheEarth?ReadandanswerWhile-readingIttakesmonths.Becauseourspacecraftaretoo

slowtocarry

largenumbersofpeopletoMars

atpresent.2.HowlongdoesthespacecraftneedtogettoMarsatpresent?Why?

While-readingEverystudentwouldhaveacomputerathomeconnectedtoaninterplanetarynetwork.3.WherewouldwestudyonMars?Bytheyear2100,thejourneymightonly

takeabout20minutesinspacecraftthattravelatthespeedoflight.4.HowlongdoesthespacecraftneedtogettoMarsinthefuture?While-readingLifeonMarsAnalyzelifeonMarsFoodwouldmostprobablyintheformofpillsandwouldnotbesotasty.ThegravityonMarsisonlyaboutthree-eighthsofthatontheEarth.ComparedwithlifeontheEarth,peoplewouldhavemorespace.Robotswoulddomostoftheirworksothattheycouldhavemoretimetorelax.Everystudentwouldhaveacomputerconnectedtoaninterplanetarynetwork.FoodGravityHousesFreetimeSchools______________________________

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Post-readingLearnthelanguagepoints1.Ourownplanet,theEarth,isbecomingmoreandmorecrowdedandpolluted

becauseoftherapidincreaseinpopulation.moreandmore用来加强程度，意为“越来越……”。e.g.越来越年轻

越来越快

越来越好

越来越细心

越来越舒服youngerandyoungerfasterandfasterbetterandbettermoreandmorecarefulmoreandmorecomfortablePost-readingatthespeedof意为“以……速度”。类似的短语：atthepriceof意为“以……的价格”。atahighprice意为“高价”。atalowcost意为“低成本”。atfull/highspeed意为“全速/高速”。e.g.那天晚上他以每小时200千米的速度驾驶。

_________________________________________________________汽车正高速行驶。

_________________________________________________________2.Withthedevelopmentoftechnology,bytheyear2100,thejourneymightonlytake

about20minutesinspacecraftthattravelatthespeedoflight!Thatnighthedrovethecaratthespeedof200kilometresperhour.Thecarsaredrivingathighspeed.Post-reading3.ThegravityonMarsisonlyaboutthree-eighthsofthatontheEarth.three-eighths意为“八分之三”。

分数表达法：分子用基数词，分母用序数词，如果分子大于1，分母要用复

数形式。注意：分数做主语，谓语动词的单复数由名词决定。二分之一通常

用ahalf来表示，而四分之一通常用aquarter,也可用afourth，四分之三通常

用threequarters或threefourths来表示。e.g.我们班五分之三是女生。_____________thestudentsinmyclass_______girls.三分之一的水是脏的。_____________thewater_____dirty.ThreefifthsofareOnethirdofisPost-reading4.Atpresent,ourspacecraftaretooslowtocarrylargenumbersofpassengersto

Mars—itwouldtakemonths.too…to…意为“太……而不能……”，注意和…so…that...can’t...,...adj.+enoughtodo...的句型转换。e.g.Sandy太小了而不能去上学。Sandyistooyoungtogotoschool.Sandyissoyoungthatshecan’tgotoschool.Sandyisnotoldenoughtogotoschool.Post-reading5.Everystudentwouldhaveacomputerathomeconnectedtoaninterplanetarynetwork.connect…to…意为“把……连接在……上，……与……连在一起”。此处connectedtoaninterplanetarynetwork是过去分词短语，作后置定语修饰名词computer。computer与connect是动宾关系，故动词用过去分词形式。如果被修饰的名词与动词之间是主谓关系，则用该动词的现在分词形式。e.g.连接上海和天津的铁路正在建设中。

___________________________________________________________TherailwayconnectingShanghaitoTianjinisunderconstructionnow.Post-readingaswellas意为“不但……而且，既……又”。注意这一短语在翻译成中文时，应先aswellas后面的内容，再翻译前面的。e.g.Theyvisitedthemuseumaswellasthezoo.

______________________________________________Heaswellashisfriendslikesgoingshopping.______________________________________________6.LifeonMarswouldbeinterestingaswellaschallenging.他们既参观了动物园，又参观了博物馆。他和他的朋友们都喜欢购物。Let’sdiscussPost-reading1.Doyouthinkit’struethatwecanliveonMars?2.WhatadvantagesanddisadvantagesarethereonMars?3.IfweliveonMars,whatshouldwedo?4.CouldhumanssurviveonMarswithoutwater,oxygenorfood?should(must/hadbetter/can)shouldn’t(mustn’t/hadbetternot/can’t/don’t)Post-readingWhatshouldwedoorshouldn’twedotoprotecttheEarth?Groupworkrideabikeorwalktoschoolusebothsidesofthepaperturnoffthelightswhenleavingplantmoretrees…pourwastewaterintoriversspeakloudinpublicsmokethrowpaperorbottlesaroundusetoomanyplasticbagsorboxes…TheEarthisourhomeanditdependsonuswhatitwillbelike.Weshouldtakecareoftheenvironmentforourselvesandforthenextgenerations.Post-readingCanyouthinkofsomesuggestionstoprotecttheEarth?DiscussPost-reading(1)Plantmoretreestopreventsandstorms.(2)Protectwetlandstopreventfloods.(3)Gotoschoolbybikeinsteadoftakingthecarto

keeptheEarthfromgetting

warmerandwarmer.(4)Stoppeoplefromcuttingdowntrees.(5)Donotdroplitter.(6)Don’tbuildtoomanytallbuildings.…Post-readingLet’swriteHowtoprotecttheEarthHowtoprotecttheEarthreducepollution...savewatersavepower…ReasonsWaysFeelingsmoreandmorepolluted…ProtecttheEarthWeallliveontheearth.Theearthisourhome.Wehaveonlyoneearth.However,______________________________________________________________________________Post-readingWeallliveontheearth.Theearthisourhome.However，ourearthisbecomingmoreandmorepolluted.（2）Wemayhavenowheretoliveinthefuture.（2分）Wemusttakecareofit.First，wecanwalktoschoolinsteadofdriving.Wecanalsoridebikesortakeabustoschool.（2）What'smore，weshouldturnoffthelightswhenleavingtheroom.（2分）Inordertosavewater，we'dbetterturnoffthetapwhenwebrushteeth.（2分）Otherwise，thelastdropofwaterwillbeourtears.（1分）Besides，wecanplantmoretreesnotonlyonthehillsbutalsoonbothsidesoftheroad.（3分）Manyhandsmakelightwork.（2S）Ifeveryonetakesactiontoprotecttheearth，I'msurewe