外研版八下课件Module 3 Unit 2 We have not found life on any other planets yet

Module3Unit2Wehavenotfoundlifeonanyotherplanetsyet. earthmoonRevision spaceshipastronaut 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.solarsystemnoneenvironmentcommunicateenvironmentnonesolarsystemuniverse Spaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.Whyhasnoonefromotherplanetstriedto(4)_____________withus?Itistruethatscientistshavenotdiscoveredlifeonotherplanetsinthe(5)_________yet,butsomescientistsbelievethattheywillfinditsomeday.communicateuniversecommunicateenvironmentnonesolarsystemuniverse 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”。not…yet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：Ihaven’tlearntanyfartherinformationyet.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?It’simpossibletoimagine.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。 WritingLookatthepicturefromasciencestoryforchildrenandanswerthequestions. Whathavethescientistsjustreceived?(amessagefromoneofourspaceships)Theyhavejustreceivedamessagefromoneofourspaceships.1.Wherehasthespaceshiplanded?(Mars)IthaslandedonMars. 2.Whathasthespaceshipdiscovered?(peopleonMars)3.WhyhavethepeopleonMarsnotsentusamessage?(donotknowhowto)IthasdiscoveredpeopleonMars.Wedonotknowhowtosendusamessage. Writeapassagetodescribethepicture.UseyouranswerstothequestionsinActivity5tohelpyou.WehavejustreceivedamessagefromourspaceshiptoMars…____________________________________________________________________________________________________________________________________ 4.WhyhavethepeopleonMarsnotvisitedusontheearth?(donotknowhowto)Wedonotknowhowtovisitusontheearth. 中考链接1.—Where’sMrGreen?—He_____toChangsha.(湖南湘西)A.havebeenB.hasgoneC.hasbeen 2.—IsTomathome?—No,he______totown.(天津)A.hasbeenB.hasgoneC.goesD.willgo3.Hepromisedtopickmeupattheschoolgate.However,he_______yet.(安徽)A.didn’tarrive   B.doesn’tarriveC.isn’tarriving     D.hasn’tarrived 4.—Whatistheweatherlikethissummerhere?—There____verylittlerain.(广州)A.hasB.hasbeenC.areD.havebeen5.Anumberoftourists______Yangzhoumanytimesbecauseitissuchabeautifulcity.(江苏扬州)A.havebeentoB.hasbeentoC.hasgonetoD.havegoneto