外研 八下 英语 Module 3《Unit 2 We have not found life on any other planets yet》课件

Module3JourneytospaceUnit2Wehavenotfoundlifeonanyotherplanetsyet.词汇听写同学们，上一课学习的单词、短语和句型你们都掌握了吗？现在大家来检验一下，点击下面的音频开始听写吧！课文导入Howmuchdoyouknowaboutotherplanets?课文呈现Readingandvocabulary1.Workinpairs.LookatthepictureandtalkaboutwhatyouknowaboutChinesespaceships.Shenzhou­9isamannedspaceship.课文呈现LearningtolearnWhenyoureadapassagewithatitleandpictures,thinkaboutthewordsyoumayfindinthepassage，andthequestionsyoumaywanttoaskbeforeyoustarttoread.课文呈现2.Readthepassageandchoosethebesttitleforit.1Anyoneoutthere?2Lifeontheearth3Thesunandotherstars4Thestarsatnight________________________Scientiststhinkthattherehasbeenlifeontheearthforhundredsofmillionsofyears.①

However,wehavenotfoundlifeonanyotherplanetsyet.Anyoneoutthere?温馨提示：此符号表示“考点精讲”链接。课文呈现Theearthisaplanetanditgoesaroundthesun.Sevenotherplanetsalsogoaroundthesun.Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.②

Thesunanditsplanetsarecalledthesolarsystem,

③andoursolarsystemisasmallpartofamuchlargergroupofstarsandplanets,calledtheGalaxyortheMilkyWay.TherearebillionsofstarsintheGalaxy,andoursunisonlyoneofthem.课文呈现Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.Theyareveryfarawayandtheirlighthastotravelformanyyearstoreachus.Sohowlargeistheuniverse?Itisimpossibletoimagine.

④词汇赏析：阅读第2、3段，只要抓住几个关键词和短语就能很形象地理解太空中“行星——恒星——太阳系——银河系——宇宙”之间的大小或包含关系：1.planet（earth）2.star（sun）3.solarsystem4.Galaxy5.universe课文呈现ScientistshavesentspaceshipstotheplanetMarstotakephotos.Theyhaveevensentspaceshipstotraveloutsidethesolarsystem.However,nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy.

⑤课文呈现Scientistshavealwaysaskedthequestions:withsomanystarsintheuniverse,arewealone,oristherelifeoutthereinspace?Havetherebeenvisitorstotheearthfromotherplanets?Whyhasnoonecommunicatedwithus?⑥

Wedonotknowtheanswers...yet.句子赏析：文章最后一段通过三个问句质疑太空中是否有其他生命存在，这是科学家们尚未解开的谜题，说明科学探究永无止境，人类太空探索永远在路上。课文呈现体裁：说明文段落之间的逻辑关系：层进结构Para.1:lifeontheearth↓Para.2:thesolarsystem↓Para.3:othergalaxies↓Para.4:spaceshipstoMars↓Para.5:scientists’questions课文呈现3.Check(√)thetruesentences.

1Theearthisastar.□2Thesunisastar.□3Thereismorethanonegalaxyintheuniverse.□4Thelightfromthestarsinothergalaxieshastravelledforalongtimetoreachus.□5Scientistshavereceivedmanymessagesfromspace.□6Spaceshipshavevisitedmostoftheuniverse.□√√√课文呈现4.Completethepassagewiththewordsandexpressioninthebox.communicateenvironmentnonesolarsystemuniverseIstherelifeonotherplanets?Therearesevenotherplanetsinour(1)______________，but(2)________ofthemhasa(n)(3)____________likethatoftheearth.Spaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.solarsystemnoneenvironment课文呈现communicateenvironmentnonesolarsystemuniverseWhyhasnoonefromotherplanetstriedto(4)____________withus?Itistruethatscientistshavenotdiscoveredlifeonotherplanetsinthe(5)________yet,butsomescientistsbelievethattheywillfinditsomeday.communicateuniverse课文呈现Writing5.Lookatthepicturefromasciencestoryforchildrenandanswerthequestions.Whathavethescientistsjustreceived?(amessagefromoneofourspaceships)Theyhavejustreceivedamessagefromoneofourspaceships.1Wherehasthespaceshiplanded?(Mars)IthaslandedonMars.课文呈现2Whathasthespaceshipdiscovered?(peopleonMars)3WhyhavethepeopleonMarsnotsentusamessage?(donotknowhowto)4WhyhavethepeopleonMarsnotvisitedusontheearth?(donotknowhowto)IthasdiscoveredpeopleonMars.Becausetheydonotknowhowtosendusamessage.Becausetheydonotknowhowtovisitusontheearth.课文呈现6.Writeapassagetodescribethepicture.UseyouranswerstothequestionsinActivity5tohelpyou.WehavejustreceivedamessagefromourspaceshiptoMars...,andwehavediscoveredpeople.Thesepeoplehaven'tsentusamessagebecausetheydon'tknowhowtosendamessage.Theyhaven'tvisitedusonearthbecausetheydon'tknowhowtovisitus.TheyhaveusedpartoftheotherspaceshipfromtheearthtomakeTVs,radiosandcars.考点精讲①Scientiststhinkthattherehasbeenlifeontheearthforhundredsofmillionsofyears.hundredsofmillionsof数亿的；数以亿计的考点1当hundred,thousand,million,billion前有具体数字修饰时，这些词后不加-s。hundredsof数以百计的thousandsof数以千计的millionsof数以百万计的billionsof数以十亿计的考点精讲e.g.EveryyearhundredsofmillionsofChinesepeoplegobacktotheirhometownfortheSpringFestival.每年都有数以亿计的中国人回到他们的家乡过春节。Therearetwothousandstudentsinthisschool.这所学校有两千名学生。考点精讲考题1：[绥化]Thereare______paintingsonexhibition（展览）.______workswerecreatedbyyoungartists.A.twohundred;TwohundredsB.twohundreds;HundredsofC.hundredsof;Twohundred【】表示概数，用数词的复数形式+of；表示确切的数量，用基数词+数词的单数形式。结合选项可知，twohundreds表达错误，故排除选项A和B。C返回温馨提示:可返回原文考点精讲②Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.none/nʌn/pron.没有一人；没有一个；一点儿也没有考点2注意:none表示“三者或三者以上的人或物都不”，其反义词是all；neither表示“两者都不”，其反义词是both。none①既可指人，也可指物；②其后可接of；③常用于回答howmany/much引导的问句。noone①只能指人（=nobody）；②其后不能接of；③作主语时，谓语动词用单数形式；④常用于回答who引导的特殊疑问句。辨析：none与noone考点精讲考点精讲e.g.Noneofushave/hasseenthefilm.我们中没有人看过这部电影。Thequestionwastoodifficult.Noonecouldanswerit.那个问题太难了。没有人能回答上来。Nooneknowsaboutit.没有人了解此事。—Howmanypeoplearethereintheroom?房间里有多少人？—None.一个人也没有。—Whohelpedyoufinishthereport?谁帮你完成这个报告的？—Noone.Ifinisheditbymyself.没有人，我自己完成的。考点精讲考题2：[东营]—Fourchildrenwerewalkingunderasmallumbrella._____ofthemgotwet.Canyouguesswhy?—Becauseitwasnotraining!A.AllB.NoneC.MostD.Some【】词义辨析法。all都；none一个也没有；most大部分；some一些。根据“ofthemgotwet”及“Becauseitwasnotraining!”可知，因为没有下雨，所以这四个人都没有被淋湿。B考点精讲environment/ɪn'vaɪrənmənt/n.环境e.g.Everyoneshouldprotecttheenvironment.每个人都应该保护环境。Allcountriesarefacingdifferentkindsofenvironmentalproblems.每个国家都面临着不同种类的环境问题。environmentn.环境environmentaladj.（有关）环境的environmentalistn.环境保护论者考点3考点精讲考题3：[武汉]Theidiom（成语）“Mengzi’smothermakesthreemoves”tellsofamotherwhodidallshecouldtoprovidethebest_____forherchild.A.experienceB.instructionC.environmentD.information【】词义辨析法。experience经历；instruction指示，命令；environment环境；information信息。由前面的Mengzi’smothermakesthreemoves及常识可知，“孟母三迁”讲的是孟母为孟子提供好的学习环境的故事。C考点精讲that/ðæt/pron.那，那个e.g.ThepopulationofSuihuaismuchsmallerthanthatofHarbin.绥化的人口比哈尔滨少得多。Theseshoesaremuchmorebeautifulthanthoseones.这些鞋比那些鞋要漂亮得多。that用来特指前文提到的单个事物或不可数名词；特指前文提及的多个事物时用those。考点4考点精讲考题4：[广元]—Howcoldhere!—Yes.TheweatherinGuangyuanismuchcolderthan_______inyourhometown.A.thatB.itC.thisD.those【】由than可知是前后两者相比较，“此天气”与“彼天气”相比，为了避免重复，后者用that来代替weather。A返回考点精讲③Thesunanditsplanetsarecalledthesolarsystem...一般现在时的被动语态e.g.Thesegreatbooksarereadbypeopleallovertheworldtoday.今天，这些伟大的著作被全世界人所阅读。Wecanleavetwohoursearlieriftheworkiscompleted.如果工作完成，我们可以提前两小时离开。考点5一般现在时被动语态的构成是：be(am/is/are)+及物动词的过去分词。被动语态中常用by引出执行动作的人或物。考点精讲考题5：[北京]Onourfarm,thetealeaves_____byhandwhentheyareready.A.pickB.pickedC.arepickedD.werepicked【】由句意可知，本句的主语thetealeaves是动作pick的承受者，应用被动语态表达，排除A、B。本句叙述的是事实，应用一般现在时态。C返回考点精讲④Itisimpossibletoimagine.impossible/ɪm'pɒsəbl/adj.(事情)办不到的，不可能的e.g.Itisimpossibleforfishtowalk.鱼是不可能走路的。Itisimpossibleformetoclimbsuchahighmountain.我不可能爬上那么高的一座山。考点6表示“不可能的”时，impossible的主语不能是人，而只能是it或事情。考点精讲possiblyadv.可能；或许↑possibleadj.可能的↓impossibleadj.不可能的Itisimpossible(forsb.)todosth.（对某人来说）做某事是不可能的。考点精讲考题6：[成都改编]用所给词的适当形式填空Theseanimalswereabletobreakawayfromtheropewhenevertheywanted,butitwasonlybecauseovertime,theybelievedthatitwasjust_____________（possible）.impossible返回考点精讲⑤However,nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy.enough/ɪ'nʌf/adv.充分地；足够地考点7adj./adv.+enoughenough+n.或n.+enough“...not+adj.+enough+todosth.”常和“too...to...”以及“so...that+否定形式的从句”互换。考点精讲e.g.Health