2020外研版八年级英语下册初二课件：Module 3 Unit2

1、Unit2Wehavenotfoundlifeonanyotherplanetsyet Module3Journeytospace Earth Mars Moon Leadin Whatisouterspacelike Hasanyonebeentoouterspace What sinouterspace Nowlet shavealook Leadin thesolarsystem Howcanwegotoouterspace Byspacecraft Leadin spaceshuttle astronaut spacestation Howcanwegotoouterspace Leadin ScientistshavesentspaceshiptoMars Thejourneyhastakenseveralmonths Leadin Astronautshavealreadybeentothemoon Leadin NoonehasbeentoMarsyet becauseMarsisveryfaraway muchfartherthanthemoon Leadin Lots

2、ofscientistsareworkinghardinordertosendastronautstoMarsoneday Leadin ScientiststhinkthattherehasbeenlifeontheEarthforhundredsofmillionsofyears However wehavenotfoundlifeonanyotherplantsyet Leadin TheEarthisaplantanditgoesaroundthesun Leadin Sevenotherplanetsalsogoaroundthesun Noneofthemhasanenvironmentlikethatoftheearth soscientistsdonotthinktheywillfindlifeonthem Leadin Thesunanditsplanetsarecalledthesolarsystem andoursolarsystemisasmallpartofamuchlargergroupofstarsandplanets calledtheGalaxyort

3、heMilkyWay Leadin TherearebillionsofstarsintheGalaxy andoursunisonlyoneofthem Leadin Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse Theyareveryfarawayandtheirlighthastotravelformanyyearstoreachus Sohowlargeistheuniverse Itisimpossibletoimagine Leadin ScientistshavesentspaceshiptotheplanetMarstotakephotos Theyhaveevensentspaceshipstotraveloutsidethesolarsystem Leadin However nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy Leadin Lookatthepictureandtalkaboutwhatyouknowabou

4、tChinesespaceships Shenzhou 9isamannedspaceship Workinpairs Readthepassageandchoosethebesttitleforit 1 Anyoneoutthere 2 Lifeontheearth3 Thesunandotherstars4 Thestarsatnight Readingandvocabulary 1 Theearthisastar 2 Thesunisastar 3 Thereismorethanonegalaxyintheuniverse Check thetruesentences Readingandvocabulary 4 Thelightfromthestarsinothergalaxieshastravelledforalongtimetoreachus 5 Scientistshavereceivedmanymessagesfromspace 6 Spaceshipshavevisitedmostoftheuniverse Readingandvocabulary Check the

5、truesentences Completethepassagewiththewordsandexpressioninthebox Istherelifeonotherplanets Therearesevenotherplanetsinour 1 but 2 ofthemhasa n 3 likethatoftheearth solarsystem none environment Readingandvocabulary Spaceshipsfromtheearthhavedonesurveysoftheotherplanets buttheyhavenotfoundanylifethere Whyhasnoonefromotherplanetstriedto 4 withus Itistruethatscientistshavenotdiscoveredlifeonotherplanetsinthe 5 yet butsomescientistsbelievethattheywillfinditsomeday communicate universe Readingandvoca

6、bulary 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 Languagepoints 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

7、 Languagepoints 3 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 Languagepoints 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 Languagepoints 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

8、遥远的星系 Languagepoints 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 Languagepoints 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 Languagepoints 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 Languagepoints 5Lookatthepicturefromasciencestoryf

9、orchildrenandanswerthequestions Writing Whathavethescientistsjustreceived amessagefromoneofourspaceships Theyhavejustreceivedamessagefromoneofourspaceships 1 Wherehasthespaceshiplanded Mars IthaslandedonMars Writing 2 Whathasthespaceshipdiscovered peopleonMars 3 WhyhavethepeopleonMarsnotsentusamessage donotknowhowto IthasdiscoveredpeopleonMars Wedonotknowhowtosendusamessage Writing 4 WhyhavethepeopleonMarsnotvisitedusontheearth donotknowhowto Wedonotknowhowtovisitusontheearth Writing Writeapassa

10、getodescribethepicture UseyouranswerstothequestionsinActivity5tohelpyou WehavejustreceivedamessagefromourspaceshiptoMars Writing 1 Where sMrGreen He toChangsha A havebeenB hasgoneC hasbeen Exercise A 2 IsTomathome No he totown A hasbeenB hasgoneC goesD willgo3 Hepromisedtopickmeupattheschoolgate However he yet A didn tarriveB doesn tarriveC isn tarrivingD hasn tarrived Exercise A D 4 Whatistheweatherlikethissummerhere There verylittlerain A hasB hasbeenC areD havebeen5 Anumberoftourists Yangzhou

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