2023學(xué)年完整公開(kāi)課版astronomy

Pan’guseparatestheskyfromtheearth

Nuwamakeshumanbeings女?huà)z補(bǔ)天Doyouthinkthefairy(童話)storiesaretrue?PanguseparatedNvwacreatedtheskyhumansHowLifeBeganontheEarthFastreadingReadthepassagealoudandmatchthemainideaforeachparagraph.MainideaofeachparagraphTheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformationoftheearthd.Awidelyacceptedtheoryabouttheformationoftheuniverse

e.

ThearrivalofhumansandtheirimpactontheearthParagraph5:Paragraph1:Paragraph2:Paragraph3:Paragraph4:Carefulreading

Task1：Readpara1andanswerthefollowingquestions.1.Accordingtoawidelyacceptedtheory,howtheuniversebegan?2.Afterthe“BigBang”whatbegantoform?Theuniversebeganwitha“BigBang”.Afterthat,atomsbegantoformandcombinetocreatestarsandotherbodies.Task2：Readpara2andfillintheblanks.Forseveralbillionyearsafterthe_________,theearthwasstilljust______________.Between__and_________yearsagowhenthedustsettledinto_____________.Itexplodedloudlywith____and____.Theyproducedsomegases,whichweretomaketheearth’s__________.Astheearthcooleddown,_______beganappearonitssurface.BigBangacloudofdust4.53.8billionasolidglobefire

rockatmosphereWater

Task3：Readpara3andanswerthequestion.Whydidscientistbelievewaterisfundamentaltohedevelopmentoflife?Becausewaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.

Puttheorderofdevelopmentoflifeintoatimeline.Insectsandamphibiansappeared.Theearthbecameasolidball.Reptilesappeared.Theearthwasacloudofdust.ShellfishandotherfishappearedDinosaursappeared.Smallplantsgrewonthewater.Plantsbegantogrowondryland.Waterappearedontheearth.Mammals(includinghumans)appeared.DBIGEHACFJClosereadingThinkaboutwhatyouhavereadandmakechoices.Whywastheearthdifferentfromotherplanets?AItproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.Whydidtheplantsgrowbeforeanimalscame?AAnimalsneededplantstoprotectthemfromthesun.BPlantsprovidedoxygenforanimalstobreathe.CAnimalscouldhidefromhuntersinforest.DItwaseasierforplantstogrow.Whatproblemiscausedbyhumanbeings?ATheyexisteverywhereontheearth.BTheycauseglobalwarming.CTheyfindnewmethodsofgrowingcrops.DTheyenjoyhuntingandfishing.ks5u精品課件5.Fromthelastparagraphwecaninferthattheauthorisalittle＿AhappyBcarelessCworriedDexited6.Whichofthefollowingstatementsistrue?A.Thedustsettledintoasolidglobebetween4.5and3.6billionyearago.B.Thefirstsmallplantsbegantoappearonthesurfaceoftheland.C.About2.6millionyearsagosomesmallcleveranimalsappearedandspreadintheocean.D.DinosaursdiedoutlongbeforehumanbeingsDevelopedontheearth.Readthelastparagraphagain,answerthefollowingquestionAfterthehumanbeingsappearad,whatdidtheydototheearth?

Becausetheyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.Theearthmaybecometoohottoliveon.Howtoprotecttheearthandmakeitabetterplacetoliveon?Wehaveonlyoneearth!Weshouldtakecareoftheearth!主語(yǔ)從句一、英語(yǔ)中的主語(yǔ)從句在句中作主語(yǔ)，有以下兩種結(jié)構(gòu)：1．主語(yǔ)從句位于句首。Whokeptthedooropenallnightwasunknown.不知道是誰(shuí)讓門(mén)整晚開(kāi)著。2．主語(yǔ)從句位于句尾，使用it作形式主語(yǔ)。it作形式主語(yǔ)置于句首的結(jié)構(gòu)(1)“It＋be＋形容詞＋that-clause”結(jié)構(gòu)，常用于這種句型的形容詞有：fortunate，possible，(un)likely，strange，probable，true，certain等。譯：真奇怪，竟然沒(méi)有人想要去那里。Itisstrangethatnoonewantstogothere.(2)“It＋be＋名詞詞組＋that-clause”結(jié)構(gòu)，常用于這種句型的名詞及名詞詞組有：anhonour，apity，ashame，nowonder，nosurprise等。真遺憾，他不能參加晚會(huì)。Itisapitythathecan’tattendtheparty.我們隊(duì)本來(lái)會(huì)贏了比賽，這一點(diǎn)也不驚訝。It‘snosurprisethatourteamshouldhavewonthegame.(3)“It＋be＋過(guò)去分詞＋that-clause”結(jié)構(gòu)，常用于這種句型的過(guò)去分詞有：said，believed，reported，proved，decided，known等。眾所周知，錢(qián)不會(huì)長(zhǎng)在樹(shù)上。Itisknowntoallthatmoneycan’tgrowonthetree.(4)It＋seems/appears/happens等不及物動(dòng)詞＋that-clause。天看起來(lái)馬上要下雨了。Itseemsthatitisgoingtorainsoon.(5)It＋doesn'tmatter(makesnodifference，etc.)＋連接代詞/連接副詞引導(dǎo)的主語(yǔ)從句。我們?cè)谀睦镎匍_(kāi)會(huì)議并不重要。Itmakesnodifferencewhereweshallhavethemeeting.注意：當(dāng)主語(yǔ)從句放在句尾而用形式主語(yǔ)時(shí)，形式主語(yǔ)只能用it，而不能使用this，that等代詞。二、主語(yǔ)從句的連接詞可以分為以下三類：1．連詞that連接詞that本身沒(méi)有意義，不作句子成分，只起引導(dǎo)作用，位于句首時(shí)，that不能省略。Thatlighttravelsinstraightlinesisknowntoall.眾所周知，光線直線運(yùn)行。2．連詞whetherwhether盡管不充當(dāng)句子成分，但是含有“是否”的意思，可以加上ornot，其語(yǔ)意不變。Whetherwe'llgocampingtomorrowdependsontheweather.我們明天是否去野營(yíng)取決于天氣。3．what，who(m)，which，whose，when，where，why，how這一類連接詞除了引導(dǎo)主語(yǔ)從句之外，在從句中又分別起代詞、副詞或形容詞的作用，在從句中分別作主語(yǔ)、賓語(yǔ)、表語(yǔ)、狀語(yǔ)和定語(yǔ)。因此，what，who(m)，which又稱為連接代詞；when，where，why，how又稱為連接副詞；whose，which，what又稱為連接形容詞。Whowilldoitdoesn'tmatter.誰(shuí)來(lái)做這件事并沒(méi)有關(guān)系。(連接代詞who在從句中作主語(yǔ))Wherethelibraryistobebuilthasnotbeendecidedyet.圖書(shū)館將要建在哪里還未確定。(連接副詞where在從句中作地點(diǎn)狀語(yǔ))4.whatever，whoever，whomever，whichever，whenever，wherever，howeverwhatever等連接詞與what等連接代詞的用法一樣，不含疑問(wèn)意義，只是具有較強(qiáng)的語(yǔ)意，有“凡是，不管，無(wú)論”等意思。whenever等連接詞也是如此。Whateverhesaidwasn'ttrue.他說(shuō)的任何事情都不是真的。Whereveryouareismyhome—myonlyhome.你在哪里哪里就是我的家——我惟一的家。注意：

(1)從句作主語(yǔ)謂語(yǔ)動(dòng)詞常用單數(shù)，但如果what引導(dǎo)的從句作主語(yǔ)，后跟名詞作表語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞則由表語(yǔ)名詞的數(shù)量決定。Whathetoldmeistrue.他告訴我的是真的。Whathesawweresomenewcomers.他看見(jiàn)的是些新來(lái)的人。(2)Itissaidthatsb.dosth.的復(fù)合句形式可轉(zhuǎn)化為簡(jiǎn)單句sb.besaidtodosth.，而且在簡(jiǎn)單句中?？疾閠odo的具體形式。(3)it引導(dǎo)的強(qiáng)調(diào)句與it作形式主語(yǔ)的復(fù)合句的區(qū)別。it引導(dǎo)的強(qiáng)調(diào)句是用來(lái)對(duì)句中除謂語(yǔ)外某一成分加以強(qiáng)調(diào)，其結(jié)構(gòu)為“Itis/was＋被強(qiáng)調(diào)部分＋that/who...”。如果被強(qiáng)調(diào)的主語(yǔ)是“人”，則可用who或that，如果被強(qiáng)調(diào)的部分是其他成分時(shí)，必須用that。ItwasIthat/whometJohninthestreet