人教版高中英语必修三unit4全课件ppt.ppt
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1、Unit4Words1.intimeintime:sooner or later;eventually 迟早;最后;终于intime(forsth/todosth):intime(forsth/todosth):not late 及时;不迟Shewillbebackintimetopreparedinner.她来得及回来准备晚饭。她来得及回来准备晚饭。Illseehimintime.总有一天我会遇见他。总有一天我会遇见他。in/outoftime:in/notinthecorrecttime合合/不合节拍不合节拍Theaudienceclappedintimetothemusic.观众合着音乐
2、的节拍拍手。观众合着音乐的节拍拍手。beharmfulto对对有害有害doharmtosb.=dosb.harm伤害某人,对某人有害处伤害某人,对某人有害处 1)Pollutionisespeciallyharmfultoanimals.2)Smokingwilldoyoualotofharm.Itdoesnoharm(forsb.)todoItdoesnoharnforyoutoopenthewindow.Thereisnoharmin(sb.s)doingsth.Thereisnoharmin(your)openingthewindow.2 2.3.multiply(数目上数目上)增加,增
3、多;乘;(使)繁殖增加,增多;乘;(使)繁殖 1)Ourproblemshavemultipliedsincelastyear.2)2and5multiplytomake10.4)Theplantsheremultiplyrapidly.3)6multipliedby5is30.=Multiply6by5tomake30.4.preventsbfrom(doing)sth=stopsbfromdoingsth阻止.做.”在主动语态中from可以省略,被动语态中不行。Howtoprevent/stopthis(from)happening.Itsnationalsmaybeprevented/s
4、toppedfromleavingthecountry.keepsbfromdoingsth中的from无论在主动语态中还是在被动语态中都不能省略。“阻止.做.”,如果省略from,意思为让某人一直做某事Hekeptmefromgettinghurt.Hekeptmedoinghomework.5.puzzle n.谜;难题 v.(使)迷惑;(使)为难Its puzzles me.feel/be puzzled about sth.对某事感到迷惑puzzle over/about sth.对某事苦苦思索 这个字母使我迷惑不解。This letter puzzles me.她对她的未来感到迷惑。
5、She felt puzzled about her future.他昨晚冥思苦想一道数学题。He puzzled over/about a math problem last night.puzzling adj.使迷惑的 puzzled adj.迷惑的;困惑的6.breakoutvt.&vi.(战争、打斗等不愉快事件)突然发生,爆发;突然发生,爆发;向外砸开;也可以表示突然大声叫喊等。Thewarbrokeoutin1937.Afirebreakoutlastnight.Shebrokeout,“Thatistoounfair!”takeplace表示“发生、举行、举办”,一般指非偶然性事
6、件的“发生”,即这种事件的发生一定有某种原因或事先的安排。例如:TheOlympicGamesof2008tookplaceinBeijing.happen作“发生、碰巧”解,常指具体事件的发生,特别指那些偶然的或未能预见的“发生”,一般用于偶然或突发性事件。例如:Astormhappenedacrosstheriverinanothercountry.occur作“发生、想到、突然想起”解,其意义相当于happen。例如:Whathasoccurred?(=Whathashappened?)comeabout表示“发生、产生”,多指事情已经发生了,但还不知道为什么,常用于疑问句和否定句。例如
7、:WhenMotherwokeup,shedidntknowwhathadcomeabout.1.Whatsthemeaningoftheword“Astronomy”?I.Warmingupl行星thescienceofstars;2.Doyouknowthefollowingterms?star,planet,thesun/moon/earth,solarsystem太阳系3.Howmanyplanetsareinthesolarsystem?恒星ScientistsnowthinkPlutoistoosmalltobecalledaplanet.4.Doyouknowthecorrect
8、orderoftheirdistancetothesun?nearesttothesun?farthesttothesun?5.Thenamesofeightplanets.Mercurym:kjriVenusEarthMarsJupiterdu:ptSaturnstnUranusjrnsNeptuneneptu:n,-tju:n1)水星水星2)金星金星3)地球地球4)火星火星5)木星木星6)土星土星7)天王星天王星8)海王星海王星Inthisunit,welllearnsomethingmorescientific.1.Whatsthetitleofthetext?2.Fromthetitl
9、e,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit?Panguseparatestheskyfromtheearth.Nvwamadehumans.1.Whendidthe“BigBang”happen?Readthepassagequicklyandanswerthequestions.2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearthsatmosphere4.Howdidwatercomeintobe
10、ingontheearth?5.Whatsthesignificanceofthepresenceofwaterontheearth?6.Whatwasimportanttothedevelopmentoffish?7.Whatmadepossibletheriseofmammalsontheearth?8.Whyaremammalsdifferentfromalllifeformsinthepast?1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.ScanningReadthepassagequicklyandansw
11、erthequestions.2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearthsatmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases.4.Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing.5.Whatsthesignificanceofthe
12、presenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.6.Whatwasimportanttothedevelopmentoffish?oxygen.7.Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth.8.Whyaremammalsdifferentfromalllifeformsinth
13、epast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.ClosereadingI.Readthepassagecarefullyandmatchthemainideawitheachparagraph.Para.1Theformation(形成形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpa
14、ctontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.Detailed readingStage1:ThedevelopmentoftheearthStage2:Thedevelopmentoflife(para13)(para45)Stage1:Thedevelopmentoftheearth(1)AftertheBigBang,whatwastheearthlike?acloudofdustasolidglobeexplodedwithfireandrockproducedwatervapourandgases(2)Wh
15、athappenednext?(3)Whatdidthewatervapourandgasesform?theearthsatmosphereWaterappeared(4)Whatappearedastheearthcooleddown?water is important for the beginning of life on the earth.Why is water so important for the beginning of life?Becausewaterallowedtheearthtodissolveharmfulgasesintooceansandseas.Sta
16、ge2 The development of lifesmallplantsappearsinwater1.Whatlifedevelopedafterwaterappeared?Shellfishandallsortsoffish2.Whatlifedevelopedinwaternext?greenplantsbegantogrowonlandinsectsappeared3.Whataboutthelifeonland?amphibiansonlandandinthewaterforests4.Whatlifedevelopednextonland?reptilesappeareddin
17、osaurdeveloped5.Whatlifedevelopedafterforestsappeared?mammalsonland6.Whatlifedevelopedafterdinosaurs?smallcleveranimals7.Whatlifedevelopedaftermammals?1.Whoarethesmallcleveranimalswithhandsandfeet?2.Aretheytakingcareoftheearthwell?Why?Becausetheyareputtingtoomuchcarbondioxideintotheatmosphere,whichp
18、reventsheatfromescapingfromtheearthintospace.Theearthmaybecometoohottoliveon.Can you fill in the blanks?23456789101 small plants in watershellfishandallsortsoffish insects reptilesamphibiansmammalsdinosaurs humansplantsanimalsGreenplantsonlandforests1.Insectsandamphibiansappeared.3.Theearthbecameaso
19、lidball.5.Reptilesappeared.7.Theearthwasacloudofdust9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth10.Theuniversebeganwitha“BigBand”.12.Mammalsappeared.831091151741262Canyou
20、puttheorderofdevelopmentoflifeintoatimeline?Ex.2onP27III.Fillintheblanksinthefollowingform.TimeWhathappenedBigBang_begantoformandcombinetocreatestarsandotherbodies.AtomsBetween4.5and3.8billionyearsagoDustsettledintoasolidand_globe.Theearthexplodedtoproduceits_.Thecontinued_ofwaterallowedtheearthtodi
21、ssolveharmfulgasesand_intotheoceansandseas.violentatmospherepresenceacidsManymillionsofyearslaterThefirstsmallplantsonthesurfaceofthewaterproduced_.Early_andallsortsoffishappeared.Greenplantsbegantogrowonland.Insectsand_appeared.oxygenshellfishamphibiansManymillionsofyearslater_appearedandtheylaideg
22、gs.Dinosaursdeveloped,laideggsand_formorethan140millionyears.Mammalsroseand_babies.ReptilesexistedgavebirthtoAbout2.6millionyearsagoSomesmall_animalswithhandsandfeetappearedandspreadallovertheearth.NowHumansproducetoomuchcarbon_,makingtheearthtoohot.cleverdioxideIV.True(T)orFalse(F).1.Theearthappear
23、edbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth.4.Lifebeganinwaterandthenonland.FFTT5.Mammalsappearedbeforethedevelopmentofdinosaurs.6.Dinosaurscouldgivebirthtoyoungbabyanimalsandproducedmilk
24、tofeedthem.7.Humanbeingsproducetoomuchcarbondioxidewhichcausestheglobalwarmingontheearth.8.Accordingtothetext,humanbeingswoulddisappearintheend.FFTF 从句一律保持陈述语序。从句一律保持陈述语序。主语主语从句从句同位语从句同位语从句表语表语从句从句宾语宾语从句从句名词性从句名词性从句在句子中起名词作用的句子叫名词从在句子中起名词作用的句子叫名词从句句(NounClauses)。)。名词从句的功能名词从句的功能相当于名词词组相当于名词词组,它在复合句中
25、能担任主它在复合句中能担任主语、宾语、表语、同位语等,因此根据语、宾语、表语、同位语等,因此根据它在句中不同的语法功能,名词从句又它在句中不同的语法功能,名词从句又可分别称为可分别称为主语从句主语从句(SubjectClause)、宾语从句宾语从句(ObjectClause)、表语从句表语从句(PredicativeClause)和和同位语从句同位语从句(AppositiveClauseWhowillwinthematchisstillunknown.Iwanttoknowwhathehastoldyou.Thefactisthatwehavelostthegame.Thenewsthatwe
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