Unit4Howlifebeganontheearth语言点省公共课一等奖全国赛课获奖课件.pptx

Unit 4 How Life Began on the Earth Language points第1页1.Nooneknowsexactlyhowtheearthbegan,asithappenedsolongago.Nooneknowswhathewassaying,asitwastoohard.仿写：没人明白他在说什么，因为那太难仿写：没人明白他在说什么，因为那太难了解了。了解了。as在这里表示原因在这里表示原因,意思是意思是“因为因为”Ashewasill,heneededmorehelp.第2页2.However,accordingtoawidelyacceptedtheory,theuniversebegan witha“BigBang”thatthrewmatterin all directions.1)begin with=start with：“以以开始开始”.2)tobeginwith=tostartwith能够单独使用能够单独使用,表示表示“首先首先;第一第一;起初起初;最初最初”.在句中作在句中作时间状语时间状语.e.g.Tobegin/startwith,Icouldntunderstandhimatall.第3页inalldirections.=ineverydirection/directions?朝四面八方朝四面八方译：译：Theenemiesranawayinalldirections.敌人四处逃窜。敌人四处逃窜。拓展：拓展：Imterriblewithdirections:_asenseofdirection:_在某人在某人指导指导下下:_onesdirection方向感方向感under我是路痴我是路痴第4页Whatitwastobecomewasuncertainbetodobe to do sth.be to do sth.be+doing:_be+done:_联想联想正在正在被动被动(1)表示表示禁止，命令禁止，命令eg.Youarenottosmokeinthisroom.Youaretobebackby10oclock.3.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.第5页(2)表示注定要表示注定要Allthesethingsaretobeansweredfor（偿还）（偿还）.（3）表示表示“将将”、“计划计划”、“安排安排”。(意思靠近于意思靠近于begoingto)如：如：.Thestudentsaretomeetattheschoolgatetomorrow.（4）应该应该shouldYouaretolookafterthelittlechildren第6页.betodo:You_thistothepolice.你应该报警你应该报警They_nextmonth.他们计划于下个月结婚。他们计划于下个月结婚。2.Theprofessor_alectureatWuhanUniversitynextweekend.A.giveB.givesC.istogiveD.beinggivenaretoreportaretobemarried第7页【巧应用】使大家惊奇是他竟没有参加会议。_ _ _ _ _he didnt come to the meeting.答案：What surprised everybody is that【精提取精提取】Whatitwastobecome是是what引导主语从句，引导主语从句，what在从句中作在从句中作become宾语。宾语。第9页1._（使大家吃惊是）（使大家吃惊是）isthathedidntcometothemeeting.Whatsurprisedeverybody2._（他所做）（他所做）addedtoourdifficulty.Whathedid第10页4.Theearthbecamesoviolentthatitwasnotclearwhetherthesolidshapewouldlastornot.地球开始变得激烈动荡，不知道这个固体形地球开始变得激烈动荡，不知道这个固体形状是否会继续下去。状是否会继续下去。n.n.固体固体 (solid,liquid,gas)adj.固体固体,坚固坚固,solid:第11页cooldown变凉变凉,冷却冷却,平息，冷静平息，冷静晒了一天太阳之后晒了一天太阳之后,他喜欢在海水中凉快一下他喜欢在海水中凉快一下.Afteradayinthesun,helikedto_inthesea.他话平息了她怒气他话平息了她怒气.Hiswords_heranger.cooleddowncooldown6.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.第12页7.WaterhadalsoappearedonotherplanetslikeMarsbut,unliketheearth,ithaddisappearedlater.unlikeprep.dislikev.likelyadj.unlikelyadj.第14页8.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.水会对于生命发展起关键作用水会对于生命发展起关键作用,这一点在当初这一点在当初并不太显著并不太显著.第15页1)allowtodo=permittodo2)harmfuladj.harmlessharmn./v.beharmfultosb./sth.=doharmtosb./sth.=dosb/sthharm对对有害有害9.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.第16页过多二氧化碳对环境有害过多二氧化碳对环境有害.Toomuchcarbondioxideistheenvironment.harmfultodoesharmto第17页10.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.1)chainreaction连锁反应连锁反应2)Makeitpossibleforlifetodevelop.使生命发展成为可能使生命发展成为可能makeit+adj./n.+.todosth.make/find/feel/think/considerthat从句从句第18页组长让我们能够一起合作组长让我们能够一起合作.Thegroupleader_老师让他们轻易地明白那个问题老师让他们轻易地明白那个问题.Theteacher_.madeitpossibleforustoworktogether.madeiteasyforthemtounderstandthequestion第19页 allsortsof=allkindsof各种各样各种各样12.whichencouragedthelaterdevelopmentofearlyshellfishandallsortsoffish.第21页13.Others,calledamphibians,wereabletoliveonlandaswellasinthewater.另外一些叫作两栖动物另外一些叫作两栖动物,它们既能在活水里生它们既能在活水里生存也能在陆地上生存也能在陆地上生.AaswellasB表示表示“(除除B之外之外)A也也;既既B又又A”.如如:ImlearningFrenchaswellasEnglish.我学英语之外还学法语我学英语之外还学法语.第22页Hegrowsflowersaswellasvegetables.他既种菜也种花他既种菜也种花.“就远标准就远标准”：HeaswellasI_(like)rockmusic.likes第23页15.Theyproducedyounggenerallybylayingeggs.它们普通是经过孵蛋而繁衍后代它们普通是经过孵蛋而繁衍后代.lie,lie,lay区分以下区分以下:动词原形第三人称单数过去式过去分词现在分词汉字释义lie lies撒谎撒谎;谎话谎话lie lies躺躺;位位于于lay lays放置放置;下蛋下蛋liedliedlyinglaylainlyinglaidlaidlaying第24页（1）vi.（消息等）传开，流传（消息等）传开，流传。如：。如：Thenewsspreadthroughtheschoolveryquickly.Thefirespreadfromthefactorytothehousenearby.18.smallcleveranimals,nowwithhandsandfeet,appearedandspreadallovertheearth.第25页（2）v.“使伸展，延伸，张开使伸展，延伸，张开”，常，常与与out连用连用。Hespreadedouthisarmstowelcomeus.他张开手臂欢迎我们。他张开手臂欢迎我们。第26页19.Thustheyhave,intheirturn,becomethemostimportantanimalsontheplanetsthusadv.所以；从而所以；从而Shestudiedhard,_.thusshegothighmarks2)Inonesturn轮到某人轮到某人Itwillbe_tobeondutytomorrow.inSamsturn第27页20.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.阻止某人做某事阻止某人做某事:preventsb.(from)doingsth.stopsb.(from)doingsth.keepsb.fromdoingsth.注意：注意：keepsb.fromdoingsth.中中from不不可省略可省略,被动被动语态中语态中,他们中他们中from都不可省都不可省。第28页1)Wemustpreventthemfrommakingtrouble.2)Youshouldpreventthechildfrominjuringhimself.第29页21.WhetherlifewillcontinueontheearthformillionsOfyearstocomewilldependonwhetherthisproblemcanbesolved.dependon:依赖，依靠依赖，依靠dependonsb.依靠依靠,相信某人相信某人dependonsth.取决与某物取决与某物第30页我们都靠你来做决定了我们都靠你来做决定了Wellall_tomakeadecision.明天是否能开校运会取决与天气明天是否能开校运会取决与天气Whethertoholdthesportsmeetingornotwill_.dependonyoudependontheweather第31页一一.单词拼写单词拼写 1.There is too much _(暴力暴力)on TV.2.With the d _ of economy,peoples living standards are higher now.3.Every night he observes the space through a t_.4.The illness is s_ through the village.5.One cannot e_ without air.6.You will _(逐步地逐步地)get used to the weather here.7.By the time they reached the top of the mountain,they were _(精疲力尽精疲力尽).8.There is a big underground railway _(系统系统)in London,which is good for travelers.9.Zhang Heng was one of the most famous Chinese a_ in the world.10.The mammals _(繁殖繁殖)when the animals,harmful to them,disappeared.第32页.短语利用短语利用 in all directions,go by,give birth to,in in all directions,go by,give birth to,in time,depend on,prevent.from,as well as,time,depend on,prevent.from,as well as,be different from be different from，escape fromescape from，watch.watch.doing,masses of,because of doing,masses of,because of 1.Whether life will continue on the earth 1.Whether life will continue on the earth for millions of years to come will _ for millions of years to come will _ whether this problem can be solved.whether this problem can be solved.2.If you put your heart into it2.If you put your heart into it，youll youll succeed _.succeed _.depend ondepend onin timein time第33页3.There were _ people in the shops 3.There were _ people in the shops yesterday.yesterday.4.Nothing can _ their plans _ being 4.Nothing can _ their plans _ being carried out.carried out.5.We _ the sun _ behind the trees 5.We _ the sun _ behind the trees and the evening fell.and the evening fell.6.Our sons are very _ each other.6.Our sons are very _ each other.7.We spent three hours waiting in the rain 7.We spent three hours waiting in the rain _ you!_ you!8.As time _,I began to realize what I 8.As time _,I began to realize what I did was wrong.did was wrong.masses ofmasses ofpreventpreventfromfromwatchedwatchedsettingsettingdifferent fromdifferent frombecause ofbecause ofwent bywent by第34页Homework1.完成书本完成书本P28 练习练习1至练习至练习3。2.书本书本P98 单词单词multiply 至至gentle 三三加一。加一。第35页