八年级英语下册 Module 3 Unit 2 We have not found life on any other planets yet课件 （新版）外研版.ppt

Module3,Journeytospace,Unit2,Wehavenotfoundlifeonanyotherplanetsyet.,earth,moon,Revision,spaceship,astronaut,spacetravel,ScientistshavesentspaceshiptoMars.Thejourneyhastakenseveralmonths.,Astronautshavealreadybeentothemoon.,NoonehasbeentoMarsyet,becauseMarsisveryfaraway,muchfartherthanthemoon.,LotsofscientistsareworkinghardinordertosendastronautstoMarsoneday.,ScientiststhinkthattherehasbeenlifeontheEarthforhundredsofmillionsofyears.However,wehavenotfoundlifeonanyotherplantsyet.,Readthepassage.,TheEarthisaplantanditgoesaroundthesun.,Sevenotherplanetsalsogoaroundthesun.Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.,Thesunanditsplanetsarecalledthesolarsystem,andoursolarsystemisasmallpartofamuchlargergroupofstarsandplanets,calledtheGalaxyortheMilkyWay.,TherearebillionsofstarsintheGalaxy,andoursunisonlyoneofthem.,Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.Theyareveryfarawayandtheirlighthastotravelformanyyearstoreachus.Sohowlargeistheuniverse?Itisimpossibletoimagine.,ScientistshavesentspaceshiptotheplanetMarstotakephotos.Theyhaveevensentspaceshipstotraveloutsidethesolarsystem.,However,nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy.,LookatthepictureandtalkaboutwhatyouknowaboutChinesespaceships.Shenzhou-9isamannedspaceship.,Workinpairs,Listenandread,Readthepassageandchoosethebesttitleforit.1.Anyoneoutthere?2.Lifeontheearth3.Thesunandotherstars4.Thestarsatnight,1.Theearthisastar.2.Thesunisastar.3.Thereismorethanonegalaxyintheuniverse.,Check()thetruesentences.,4.Thelightfromthestarsinothergalaxieshastravelledforalongtimetoreachus.5.Scientistshavereceivedmanymessagesfromspace.6.Spaceshipshavevisitedmostoftheuniverse.,Completethepassagewiththewordsandexpressioninthebox.,Istherelifeonotherplanets?Therearesevenotherplanetsinour(1)_,but(2)_ofthemhasa(n)(3)_likethatoftheearth.,solarsystem,none,environment,Spaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.Whyhasnoonefromotherplanetstriedto(4)_withus?Itistruethatscientistshavenotdiscoveredlifeonotherplanetsinthe(5)_yet,butsomescientistsbelievethattheywillfinditsomeday.,communicate,universe,1.ScientiststhinkthattherehasbeenlifeontheEarthforhundredsofmillionsofyears.科学家认为地球上的生命已经有亿万年了。millionsof数百万hundredsof数百thousandsof成千上万billionsof数十亿,Languagepoints,e.g.TherearebillionsofstarsintheGalaxy,andoursunisonlyoneofthem.银河系中有数十亿颗恒星，我们的太阳只是其中的一个。2.However,wehavenotfoundlifeonanyotherplanetsyet.然而，我们还没有在任何其他行星上发现生命。,yet用于否定句和疑问句，意思是“还，尚”。notyet的意思是“还没，尚未”，表示某事物在某一时间尚未发生，但未来也许会发生。例如：Ihaventlearntanyfartherinformationyet.我还没有得到进一步的信息。Haveyoureceivedherletteryet?你收到她的来信了吗？,3.TheEarthisaplanetanditgoesaroundthesun.Sevenotherplanetsalsogoaroundthesun.地球是颗行星，它围绕着太阳转。此外还有七颗行星也围绕着太阳转。太阳系的其他七颗行星：水星(Mercury)、金星(Venus)、火星(Mars)、木星(Jupiter)、土星(Saturn)、天王星(Uranus)、海王星(Neptune)。,4.Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.他们中没有一个有像地球这样的环境，因此科学家们认为在他们上面找不到生命。noneof表示（三个以上）一个也没有。做主语时，谓语动词可用单数或复数。,e.g.Noneofushas/havebeentotheMars.我们中没一个去过火星。5.oursolarsystemisasmallpartofamuchlargergroupofstarsandplanets,calledtheGalaxyortheMilkyWay.我们的太阳系只是一个由恒星和行星组成的星系的一小部分，这个星系比太阳系大得多，称作银河系或银河。,这里的theGalaxy专指“银河系”，也可以称作theMilkyWay。而galaxy则泛指“星系”。e.g.Scientistshavediscoveredadistantgalaxy.科学家们发现了一个遥远的星系。,6.Sohowlargeistheuniverse?Itsimpossibletoimagine.所以宇宙有多大？我们无从想象。,句型:Itis+形容词+to+动词原形，意思是“做某事很”e.g.Itisdifficulttoreadthesewords.读这些单词很难。,7.Withsomanystarsintheuniverse,arewealone,oristherelifeoutthereinspace?宇宙中有这么多星球，我们是孤独的吗？或者太空中还有其他生命存在呢？,with+名词+介词短语，表示伴随情况，意思是“带着”。,e.g.Mr.Zhangiscomingwithabookinhishands.张老师手里带着一书进来了。alone在句中作形容词，不作定语只做表语，也可作副词。意思是“独自地”。e.g.Shewasaloneinthatdarkroom.她独自一人呆在那黑屋子里。,Writing,Lookatthepicturefromasciencestoryforchildrenandanswerthequestions.,Whathavethescientistsjustreceived?(amessagefromoneofourspaceships)Theyhavejustreceivedamessagefromoneofourspaceships.1.Wherehasthespaceshiplanded?(Mars),IthaslandedonMars.,2.Whathasthespaceshipdiscovered?(peopleonMars)3.WhyhavethepeopleonMarsnotsentusamessage?(donotknowhowto),IthasdiscoveredpeopleonMars.Wedonotknowhowtosendusamessage.,4.WhyhavethepeopleonMarsnotvisitedusontheearth?(donotknowhowto),Wedonotknowhowtovisitusontheearth.,Writeapassagetodescribethepicture.UseyouranswerstothequestionsinActivity5tohelpyou.WehavejustreceivedamessagefromourspaceshiptoMars_,中考链接,1.WheresMrGreen?He_toChangsha.(2013湖南湘西)A.havebeenB.hasgoneC.hasbeen,2.IsTomathome?No,he_totown.(2013天津)A.hasbeenB.hasgoneC.goesD.willgo3.Hepromisedtopickmeupattheschoolgate.However,he_yet.(2011安徽)A.didntarriveB.doesntarriveC.isntarriving