外研社八下M3Unit2課件

Unit2

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

圍繞airwaterlightEarthenvironmentNone

ofthemhasanenvironmentwithair,sopeopleandthingscannotgrow.Thesunanditsplanetsarecalledthesolarsystem.

太陽(yáng)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.

科學(xué)家認(rèn)為地球上的生命已經(jīng)有億萬(wàn)年了。

millionsof數(shù)百萬(wàn)hundredsof數(shù)百 thousandsof成千上萬(wàn)billionsof數(shù)十億Languagepointse.g銀河系中有數(shù)十億顆恒星，我們的太 陽(yáng)只是其中的一個(gè)。.

TherearebillionsofstarsintheGalaxy,andoursunisonlyoneofthem.2.However,wehavenotfoundlifeonanyotherplanetsyet.

而然，我們還沒有在任何其他行星上 發(fā)現(xiàn)生命。4.Noneofthemhasanenvironmentlike thatoftheearth,soscientistsdonot thinktheywillfindlifeonthem.

他們中沒有一個(gè)有像地球這樣的環(huán)境，因 此科學(xué)家們認(rèn)為在他們上面找不到生命。

noneof…表示（三個(gè)以上）一個(gè)也沒有。做主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞可用單數(shù)或復(fù)數(shù)。e.g.我們中沒一個(gè)去過火星。Noneofushas/havebeentotheMars.5.Sohowlargeistheuniverse?It’s

impossible

toimagine.

所以宇宙有多大？我們無(wú)從想象。句型:Itis+形容詞+to+動(dòng)詞原形，意思是“做某事很……”e.g.Itisdifficulttoreadthesewords. 讀這些單詞很難。6.Withsomanystarsintheuniverse,are wealone,oristherelifeouttherein space?

宇宙中有這么多星球，我們是孤獨(dú)的 嗎？或者太空中還有其他生命存在呢？with+名詞+介詞短語(yǔ)，表示伴隨情況，意思是“帶著……”。e.g. 張老師手里帶著一書進(jìn)來(lái)了。alone在句中作形容詞，不作定語(yǔ)只做表語(yǔ)，也可作副詞。意思是“獨(dú)自地”。e.g.Shewasaloneinthatdarkroom.

她獨(dú)自一人呆在那黑屋子里。Mr.Zhangiscomingwithabookinhishands.ontheearth=onEarthhundredsof/millionsofgoaroundnoneofbecalledasmallpartofmuchlargerintheuniverseenoughtodobealoneinspacecommunicatewith1.在地球上2.上百、上百萬(wàn)的3.環(huán)繞4.……沒有一個(gè)(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.獨(dú)自的11.在太空中12.與……聯(lián)系詞組Completethepassagewiththewordsandexpressioninthebox.communicateenvironmentnonesolarsystemuniverseIstherelifeonotherplanets?Therearesevenotherplanetsinour(1)____________,but(2)______ofthemhasa(n)(3)____________likethatoftheearth.solarsystemnoneenvironmentSpaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.Whyhasnoonefromotherplanetstriedto(4)____________withus?Itistrueth