外研社八下M3Unit2课件

Unit2

Wehaven’tfoundlifeonanyotherplanetsyet.thesunThesungivesuslightandheat.Thesunisastar.(恒星）theearthTheearthdoesn’tgiveuslightandheat.Theearthisaplanet.(行星）EightplanetsgoaroundtheSun.

围绕airwaterlightEarthenvironmentNone

ofthemhasanenvironmentwithair,sopeopleandthingscannotgrow.Thesunanditsplanetsarecalledthesolarsystem.

太阳系被叫做200billionstarsinourgalaxyMilkyWayManyothergalaxiesintheuniversegalaxyplanetsolarsystemuniversestarPutthewordsincorrectorder.planetsmallstaruniversegalaxysolarsystemlarge1.Readthepassageandchoosethebesttitle.a.Anyoneoutthere?b.Lifeonearthc.Oursolarsystemd.ThestarsatnightHavewefoundlifeonotherplanetsyet?1.TheEarthisastar.2.TheSunisastar.3.Thereismorethanonegalaxyintheuniver.4.Thelightfromthestarsinothergalaxieshastravelledforalongtimetoreachus.ReadPagraphy1—3andcheck(✓)thetruesentences✓✓Readcarefullyandfinddetails✓5.Scientistsreceivedmanymessagesfromspace.6.Spaceshipshavevisitedmostoftheuniverse.ReadPagraphy4—5andcheck(✓)thetruesentences1.Scientiststhinkthattherehasbeenlife ontheEarthforhundredsof

millionsof years.

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Languagepointse.g银河系中有数十亿颗恒星，我们的太 阳只是其中的一个。.

TherearebillionsofstarsintheGalaxy,andoursunisonlyoneofthem.2.However,wehavenotfoundlifeonanyotherplanetsyet.

而然，我们还没有在任何其他行星上 发现生命。4.Noneofthemhasanenvironmentlike thatoftheearth,soscientistsdonot thinktheywillfindlifeonthem.

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.我们中没一个去过火星。Noneofushas/havebeentotheMars.5.Sohowlargeistheuniverse?It’s

impossible

toimagine.

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。6.Withsomanystarsintheuniverse,are wealone,oristherelifeouttherein space?

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. 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。Mr.Zhangiscomingwithabookinhishands.ontheearth=onEarthhundredsof/millionsofgoaroundnoneofbecalledasmallpartofmuchlargerintheuniverseenoughtodobealoneinspacecommunicatewith1.在地球上2.上百、上百万的3.环绕4.……没有一个(三者以上)5.被叫做6…….中的一小部分7.更大8.在宇宙中9.足以做……10.独自的11.在太空中12.与……联系词组Completethepassagewiththewordsandexpressioninthebox.communicateenvironmentnonesolarsystemuniverseIstherelifeonotherplanets?Therearesevenotherplanetsinour(1)____________,but(2)______ofthemhasa(n)(3)____________likethatoftheearth.solarsystemnoneenvironmentSpaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.Whyhasnoonefromotherplanetstriedto(4)____________withus?Itistrueth