外研版英语八年级下m3Unit2.ppt

earthmoonspaceshipastronautspacetravelScientistshavesentspaceshiptoMars.Thejourneyhastakenseveralmonths.Astronautshavealreadybeentothemoon.NoonehasbeentoMarsyet,becauseMarsisveryfaraway,muchfartherthanthemoon.LotsofscientistsareworkinghardinordertosendastronautstoMarsoneday.LookatthepictureandtalkaboutwhatyouknowaboutChinesespaceships.Shenzhou-9isamannedspaceship.Readthepassageandchoosethebesttitleforit.1.Anyoneoutthere?2.Lifeontheearth3.Thesunandotherstars4.Thestarsatnight√1.Theearthisastar.2.Thesunisastar.3.Thereismorethanonegalaxyintheuniverse.Check(√)thetruesentences.×√√4.Thelightfromthestarsinothergalaxieshastravelledforalongtimetoreachus.5.Scientistshavereceivedmanymessagesfromspace.6.Spaceshipshavevisitedmostoftheuniverse.√××Completethepassagewiththewordsandexpressioninthebox.communicateenvironmentnonesolarsystemuniverseIstherelifeonotherplanets?Therearesevenotherplanetsinour(1)____________,but(2)______ofthemhasa(n)(3)____________likethatoftheearth.solarsystemnoneenvironmentSpaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.Whyhasnoonefromotherplanetstriedto(4)_____________withus?Itistruethatscientistshavenotdiscoveredlifeonotherplanetsinthe(5)_________yet,butsomescientistsbelievethattheywillfinditsomeday.communicateuniverse1.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e.g.TherearebillionsofstarsintheGalaxy,andthesunisonlyoneofthem.银河系中有数十亿颗恒星，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.它们中没有一个有像地球这样的环境，因此科学家们认为在它们上面找不到生命。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。Lookatthepicturefromasciencestoryforchildrenandanswerthequestions.Whathavethescientistsjustreceived?(amessagefromoneofourspaceships)Theyhavejustreceivedamessagefromoneofourspaceships.1.Wherehasthespaceshiplanded?(Mars)IthaslandedonMars.2.Whathasthespaceshipdiscovered?(peopleonMars)3.WhyhavethepeopleonMarsnotsentusamessage?(donotknowhowto)IthasdiscoveredpeopleonMars.Wedonotknowhowtosendusamessage.4.WhyhavethepeopleonMarsnotvisitedusontheearth?(donotknowhowto)Wedonotknowhowtovisitusontheearth.Writeapassagetodescribethepicture.UseyouranswerstothequestionsinActivity5tohelpyou.WehavejustreceivedamessagefromourspaceshiptoMars…____________________________________________________________________________________________________________________________________1.—Where’sMrGreen?—He_____toChangsha.(2013湖南湘西)A.havebeenB.hasgoneC.hasbeen2.—IsTomathome?—No,he______totown.(2013天津)A.hasbeenB.hasgoneC.goesD.willgo3.Hepromisedtopickmeupattheschoolgate.However,he_______yet.(2011安徽)A.didn’tarriveB.doesn’tarriveC.isn’tarrivingD.hasn’tarrived4.—Whatistheweatherlikethissummerhere?—There____verylittlerain.(2011广州)A.hasB.hasbeenC.areD.havebeen5.Anumberoftourists______Yangzhoumanytimesbecauseitissuchabeautifulcity.(2013扬州)A.havebeentoB.hasbeentoC.hasgonetoD.havegoneto