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

Module3JourneytospaceUnit2Wehavenotfoundlifeonanyotherplanetsyet.詞匯聽寫同學(xué)們，上一課學(xué)習(xí)的單詞、短語和句型你們都掌握了嗎？現(xiàn)在大家來檢驗一下，點擊下面的音頻開始聽寫吧！課文導(dǎo)入Howmuchdoyouknowaboutotherplanets?課文呈現(xiàn)Readingandvocabulary1.Workinpairs.LookatthepictureandtalkaboutwhatyouknowaboutChinesespaceships.Shenzhou-9isamannedspaceship.課文呈現(xiàn)LearningtolearnWhenyoureadapassagewithatitleandpictures,thinkaboutthewordsyoumayfindinthepassage，andthequestionsyoumaywanttoaskbeforeyoustarttoread.課文呈現(xiàn)2.Readthepassageandchoosethebesttitleforit.1Anyoneoutthere?2Lifeontheearth3Thesunandotherstars4Thestarsatnight________________________Scientiststhinkthattherehasbeenlifeontheearthforhundredsofmillionsofyears.①

However,wehavenotfoundlifeonanyotherplanetsyet.Anyoneoutthere?溫馨提示：此符號表示“考點精講”鏈接。課文呈現(xiàn)Theearthisaplanetanditgoesaroundthesun.Sevenotherplanetsalsogoaroundthesun.Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.②

Thesunanditsplanetsarecalledthesolarsystem,

③andoursolarsystemisasmallpartofamuchlargergroupofstarsandplanets,calledtheGalaxyortheMilkyWay.TherearebillionsofstarsintheGalaxy,andoursunisonlyoneofthem.課文呈現(xiàn)Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.Theyareveryfarawayandtheirlighthastotravelformanyyearstoreachus.Sohowlargeistheuniverse?Itisimpossibletoimagine.

④詞匯賞析：閱讀第2、3段，只要抓住幾個關(guān)鍵詞和短語就能很形象地理解太空中“行星——恒星——太陽系——銀河系——宇宙”之間的大小或包含關(guān)系：1.planet（earth）2.star（sun）3.solarsystem4.Galaxy5.universe課文呈現(xiàn)ScientistshavesentspaceshipstotheplanetMarstotakephotos.Theyhaveevensentspaceshipstotraveloutsidethesolarsystem.However,nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy.

⑤課文呈現(xiàn)Scientistshavealwaysaskedthequestions:withsomanystarsintheuniverse,arewealone,oristherelifeoutthereinspace?Havetherebeenvisitorstotheearthfromotherplanets?Whyhasnoonecommunicatedwithus?⑥

Wedonotknowtheanswers...yet.句子賞析：文章最后一段通過三個問句質(zhì)疑太空中是否有其他生命存在，這是科學(xué)家們尚未解開的謎題，說明科學(xué)探究永無止境，人類太空探索永遠在路上。課文呈現(xiàn)體裁：說明文段落之間的邏輯關(guān)系：層進結(jié)構(gòu)Para.1:lifeontheearth↓Para.2:thesolarsystem↓Para.3:othergalaxies↓Para.4:spaceshipstoMars↓Para.5:scientists’questions課文呈現(xiàn)3.Check(√)thetruesentences.

1Theearthisastar.□2Thesunisastar.□3Thereismorethanonegalaxyintheuniverse.□4Thelightfromthestarsinothergalaxieshastravelledforalongtimetoreachus.□5Scientistshavereceivedmanymessagesfromspace.□6Spaceshipshavevisitedmostoftheuniverse.□√√√課文呈現(xiàn)4.Completethepassagewiththewordsandexpressioninthebox.communicateenvironmentnonesolarsystemuniverseIstherelifeonotherplanets?Therearesevenotherplanetsinour(1)______________，but(2)________ofthemhasa(n)(3)____________likethatoftheearth.Spaceshipsfromtheearthhavedonesurveysoftheotherplanets,buttheyhavenotfoundanylifethere.solarsystemnoneenvironment課文呈現(xiàn)communicateenvironmentnonesolarsystemuniverseWhyhasnoonefromotherplanetstriedto(4)____________withus?Itistruethatscientistshavenotdiscoveredlifeonotherplanetsinthe(5)________yet,butsomescientistsbelievethattheywillfinditsomeday.communicateuniverse課文呈現(xiàn)Writing5.Lookatthepicturefromasciencestoryforchildrenandanswerthequestions.Whathavethescientistsjustreceived?(amessagefromoneofourspaceships)Theyhavejustreceivedamessagefromoneofourspaceships.1Wherehasthespaceshiplanded?(Mars)IthaslandedonMars.課文呈現(xiàn)2Whathasthespaceshipdiscovered?(peopleonMars)3WhyhavethepeopleonMarsnotsentusamessage?(donotknowhowto)4WhyhavethepeopleonMarsnotvisitedusontheearth?(donotknowhowto)IthasdiscoveredpeopleonMars.Becausetheydonotknowhowtosendusamessage.Becausetheydonotknowhowtovisitusontheearth.課文呈現(xiàn)6.Writeapassagetodescribethepicture.UseyouranswerstothequestionsinActivity5tohelpyou.WehavejustreceivedamessagefromourspaceshiptoMars...,andwehavediscoveredpeople.Thesepeoplehaven'tsentusamessagebecausetheydon'tknowhowtosendamessage.Theyhaven'tvisitedusonearthbecausetheydon'tknowhowtovisitus.TheyhaveusedpartoftheotherspaceshipfromtheearthtomakeTVs,radiosandcars.考點精講①Scientiststhinkthattherehasbeenlifeontheearthforhundredsofmillionsofyears.hundredsofmillionsof數(shù)億的；數(shù)以億計的考點1當(dāng)hundred,thousand,million,billion前有具體數(shù)字修飾時，這些詞后不加-s。hundredsof數(shù)以百計的thousandsof數(shù)以千計的millionsof數(shù)以百萬計的billionsof數(shù)以十億計的考點精講e.g.EveryyearhundredsofmillionsofChinesepeoplegobacktotheirhometownfortheSpringFestival.每年都有數(shù)以億計的中國人回到他們的家鄉(xiāng)過春節(jié)。Therearetwothousandstudentsinthisschool.這所學(xué)校有兩千名學(xué)生?？键c精講考題1：[綏化]Thereare______paintingsonexhibition（展覽）.______workswerecreatedbyyoungartists.A.twohundred;TwohundredsB.twohundreds;HundredsofC.hundredsof;Twohundred【】表示概數(shù)，用數(shù)詞的復(fù)數(shù)形式+of；表示確切的數(shù)量，用基數(shù)詞+數(shù)詞的單數(shù)形式。結(jié)合選項可知，twohundreds表達錯誤，故排除選項A和B。C返回溫馨提示:可返回原文考點精講②Noneofthemhasanenvironmentlikethatoftheearth,soscientistsdonotthinktheywillfindlifeonthem.none/n?n/pron.沒有一人；沒有一個；一點兒也沒有考點2注意:none表示“三者或三者以上的人或物都不”，其反義詞是all；neither表示“兩者都不”，其反義詞是both。none①既可指人，也可指物；②其后可接of；③常用于回答howmany/much引導(dǎo)的問句。noone①只能指人（=nobody）；②其后不能接of；③作主語時，謂語動詞用單數(shù)形式；④常用于回答who引導(dǎo)的特殊疑問句。辨析：none與noone考點精講考點精講e.g.Noneofushave/hasseenthefilm.我們中沒有人看過這部電影。Thequestionwastoodifficult.Noonecouldanswerit.那個問題太難了。沒有人能回答上來。Nooneknowsaboutit.沒有人了解此事?！狧owmanypeoplearethereintheroom?房間里有多少人？—None.一個人也沒有。—Whohelpedyoufinishthereport?誰幫你完成這個報告的？—Noone.Ifinisheditbymyself.沒有人，我自己完成的?？键c精講考題2：[東營]—Fourchildrenwerewalkingunderasmallumbrella._____ofthemgotwet.Canyouguesswhy?—Becauseitwasnotraining!A.AllB.NoneC.MostD.Some【】詞義辨析法。all都；none一個也沒有；most大部分；some一些。根據(jù)“ofthemgotwet”及“Becauseitwasnotraining!”可知，因為沒有下雨，所以這四個人都沒有被淋濕。B考點精講environment/?n'va?r?nm?nt/n.環(huán)境e.g.Everyoneshouldprotecttheenvironment.每個人都應(yīng)該保護環(huán)境。Allcountriesarefacingdifferentkindsofenvironmentalproblems.每個國家都面臨著不同種類的環(huán)境問題。environmentn.環(huán)境environmentaladj.（有關(guān)）環(huán)境的environmentalistn.環(huán)境保護論者考點3考點精講考題3：[武漢]Theidiom（成語）“Mengzi’smothermakesthreemoves”tellsofamotherwhodidallshecouldtoprovidethebest_____forherchild.A.experienceB.instructionC.environmentD.information【】詞義辨析法。experience經(jīng)歷；instruction指示，命令；environment環(huán)境；information信息。由前面的Mengzi’smothermakesthreemoves及常識可知，“孟母三遷”講的是孟母為孟子提供好的學(xué)習(xí)環(huán)境的故事。C考點精講that/e?t/pron.那，那個e.g.ThepopulationofSuihuaismuchsmallerthanthatofHarbin.綏化的人口比哈爾濱少得多。Theseshoesaremuchmorebeautifulthanthoseones.這些鞋比那些鞋要漂亮得多。that用來特指前文提到的單個事物或不可數(shù)名詞；特指前文提及的多個事物時用those?？键c4考點精講考題4：[廣元]—Howcoldhere!—Yes.TheweatherinGuangyuanismuchcolderthan_______inyourhometown.A.thatB.itC.thisD.those【】由than可知是前后兩者相比較，“此天氣”與“彼天氣”相比，為了避免重復(fù)，后者用that來代替weather。A返回考點精講③Thesunanditsplanetsarecalledthesolarsystem...一般現(xiàn)在時的被動語態(tài)e.g.Thesegreatbooksarereadbypeopleallovertheworldtoday.今天，這些偉大的著作被全世界人所閱讀。Wecanleavetwohoursearlieriftheworkiscompleted.如果工作完成，我們可以提前兩小時離開?？键c5一般現(xiàn)在時被動語態(tài)的構(gòu)成是：be(am/is/are)+及物動詞的過去分詞。被動語態(tài)中常用by引出執(zhí)行動作的人或物?？键c精講考題5：[北京]Onourfarm,thetealeaves_____byhandwhentheyareready.A.pickB.pickedC.arepickedD.werepicked【】由句意可知，本句的主語thetealeaves是動作pick的承受者，應(yīng)用被動語態(tài)表達，排除A、B。本句敘述的是事實，應(yīng)用一般現(xiàn)在時態(tài)。C返回考點精講④Itisimpossibletoimagine.impossible/?m'p?s?bl/adj.(事情)辦不到的，不可能的e.g.Itisimpossibleforfishtowalk.魚是不可能走路的。Itisimpossibleformetoclimbsuchahighmountain.我不可能爬上那么高的一座山?？键c6表示“不可能的”時，impossible的主語不能是人，而只能是it或事情。考點精講possiblyadv.可能；或許↑possibleadj.可能的↓impossibleadj.不可能的Itisimpossible(forsb.)todosth.（對某人來說）做某事是不可能的?？键c精講考題6：[成都改編]用所給詞的適當(dāng)形式填空Theseanimalswereabletobreakawayfromtheropewhenevertheywanted,butitwasonlybecauseovertime,theybelievedthatitwasjust_____________（possible）.impossible返回考點精講⑤However,nospaceshiphastravelledfarenoughtoreachotherstarsinourGalaxy.enough/?'n?f/adv.充分地；足夠地考點7adj./adv.+enoughenough+n.或n.+enough“...not+adj.+enough+todosth.”常和“too...to...”以及“so...that+否定形式的從句”互換。考點精講e.g.Health