2023学年完整公开课版必修3unit4知识点

Unit4ReadingHowlifebeganontheearth?LanguagepointsUnit41.Nooneknowsexactlyhowtheearthbegan,asithappenedsolongago.——————————————————Nooneseeswhathe’ssaying,asitistoohard.

仿写：没人明白他在说什么，因为那太难理解了。2.However,accordingtoawidelyacceptedtheory,theuniversebeganwitha“BigBang”thatthrewmatterinalldirections.

beginwith=startwith：“以……开始”.1)tobeginwith=tostartwith以…为起点;开始(做)这两个词组都可以单独使用,表示“首先;第一;起初;最初”.在句中作时间状语.e.g.Tobegin/startwith,Icouldn’tlikehimatall.起初,我一句也没弄明白.3.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe._________________

（使大家吃惊的是）isthathedidn’tcometothemeeting.Whatsurprisedeverybody

2.___________（他所做的addedtoourdifficulty.

Whathedid

仿写:李老师明天将去北京，直到那时才能知道谁将代替她给我们上课。________________________________________________________________________________WhowillgiveuslessonsinplaceofMissLiisn’tknownuntiltomorrowwhenshewillgotoBeijing.4.Theearthbecameso

violent

thatitwasnotclearwhetherthesolidshapewouldlastornot.问题是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。n.固体

(solid,liquid,gas)adj.固体的,实心的,无空隙的；结实的,

Solid:2)violent

猛烈的，激烈的

violencen.暴力3)lastv.持续好天气只会持续几天

Thefineweatheronlylastedforafewday

友谊长存

Friendshiplastsforever.

5.Itexplodedloudlywithfireandrock,whichwereintimetoproducecarbon,nitrogen,watervapourandothergases,whichwerewomaketheearth’satmosphere.1).（使某物）炸开，爆炸

2).（指感情）迸发搭配：

3).（指人口）突然或迅速增加

eg:Thefireworkexplodedinhishandandhewashurtseriously.

eg:Thechildrenexplodedintolaughter.eg:Theteacherexplodedwithanger.

explosionn.爆炸（声）

explosiveadj.爆炸性的，易爆炸的

explodewith/in/into...eg:Nowitisnoteasytofindjobswiththeexplodingworldpopulation.(sth)beto(do):1.不可避免要发生或必须发生。Sheistobehonouredforthisgreatwork.

2表示按计划、安排要发生的动作Whenaretheytohandintheirplan？3表命令Tellhersheisnottobebacklate!

intime:soonerorlater;eventually迟早;最终我迟早会遇见他.

I’llseehim

intime.

intime(forsth./todosth.):notlate及时；不迟

她会及时回来准备晚餐.Shewillbebackintimetopreparedinner.

你认为我们能及时赶上火车吗?Doyouthinkwecangetthere_________thetrain?intimeforexercise:

与time相关的短语:

ontime按时;准时

innotime

立刻,马上

attimes

有时

atatime

每次;依次

onceuponatime

从前

atonetime

从前

forthetimebeing

暂时

fromtimetotime

不时地

cooldown

变凉,冷却,平息，冷静晒了一天的太阳之后,他喜欢在海水中凉快一下.Afteradayinthesun,helikedto________inthesea.他的话平息了她的怒气.Hiswords_____________heranger.cooleddowncooldown6.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.

随着地球的冷却,地球的表面就开始出现了水。7.WaterhadalsoappearedonotherplanetslikeMarsbut,unliketheearth,ithaddisappearedlater.

仿写：他们尽了最大的努力，但让他们失望的是他们没有赢得那场比赛。___________________________________Theytriedtheirbestbut,totheirdisappointment,theydidn’twinthegame.8.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.

水会对于生命的发展起关键作用,这一点在当时并不太明显.

本句体现的是名词性从句在句中作主语的作用,虽然是以It开头,可是It只起到形式主语的作用,真正的主语是thatwaterwastobefundamentaltothedevelopment

oflife.用It做形式主语是因为that引导的从句较长,如果按照正常语序来安排的话就显得头重脚轻了.如:Itisnowonderthathehaspassedtheexam.ItisquitenecessaryforustolearnEnglishwell.allow…to…=permit…todo…harmfuladj.Opp:harmlessharmn./v.beharmfultosb./sth.=doharmtosb./sth.=dosb/sthharm对…有害过多的二氧化碳对环境有害.Toomuchcarbondioxideisharmfulto/doesharmtotheenvironment.9.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.10.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.Chainreaction连锁反应Makeitpossibleforlifetodevelop.

使生命的发展成为可能

makeit+adj./n.sb./sth.todosth.

组长让我们可以一起合作.Thegroupleader_____________________老师让他们跟容易地明白那个问题.Theteacher_________________________________.makeitpossibleforustoworktogether.madeiteasyforthemtounderstandthequestion1)multiplyv.乘:增加,繁殖；7乘以4等于28.4multipliedby7istwenty-eight.我们的功课自上以来增多了.Ourhomeworkhavemultipliedsincewecametohighschool.蚊子在夏天繁殖得很快.Mosquitoesmultiplyrapidlyinsummer.

11.Theymultipliedandfilledtheoceansandseaswithoxygen,whichencouraged…=4and7multiplytomake28.

=Multiply7by4tomake28.

allsortsof=allkindsof

各种各样的12.…whichencouragedthelaterdevelopmentofearlyshellfishandallsortsoffish.13.Others,calledamphibians,wereabletoliveonlandaswellasinthewater.

另外一些叫作两栖动物,它们既能在陆地上生活也能在水里生存.

aswellas

表示“(除….之外)也;既……又”.如:I’mlearningFrenchaswellasEnglish.我学英语之外还学法语.Hegrowsflowersaswellasvegetables.他既种菜也种花.“就远原则”：HeaswellasI______rockmusic.likes14.Theyproducedyounggenerallybylayingeggs.

It’sgenerallybelievedthat…一般认为…

generallyspeaking

一般而言，概括来说

1)It’sgenerallybelievedthatgirlsworkharderthanboysdo.

2)Generallyspeaking,womencrymoreeasilythanmen.

15.Theyproducedyounggenerallybylaying

eggs.它们一般是通过孵蛋而繁衍后代的.lie,lie,lay的区别如下:动词原形第三人称单数过去式过去分词现在分词中文释义lieliesliedliedlying撒谎;谎话lielieslaylainlying躺;位于laylayslaidlaidlaying放置;下蛋16.Theylaideggstooandexistedontheearthformorethan140millionyears.

existin存在与…之中

existon靠…为生

existby靠…生存

Itwasimpossibleforthemto________suchasmallincome.

Theuniverse_________space.

existonexistsinThewildman__________huntingwildanimalintheforest.existedbyinexistence

现存的comeintoexistence=comeintobeing

开始存在、成立Whendidthisworldcomeintoexistence?17.Theseanimalsweredifferentfromalllifeformsinthepast,becausetheygavebirthtoyoungbabyanimalsandproducemilktofeedthem.

givebirthto

1)生（孩子）

She’sjustgivenbirthtoahealthybabygirl.

她刚刚生了个健康的女婴。

2)产生

Theextraordinaryexperiencegavebirthtohislatestnovel.

这段奇特的经历促成了他的最新的一部小说的诞生。（1）vi.（消息等）传开，流传。如：Thenewsspreadthroughtheschoolveryquickly.Thefirespreadfromthefactorytothehousenearby.（2）vt.“使伸展，延伸，张开”，常与out连用。Hespreadouthisarmstowelcomeus.Ispreadanewclothonthetable.我在餐桌上铺上一条新桌布。他张开手臂欢迎我们。18.smallcleveranimals,nowwithhandsandfeet,appearedandspreadallovertheearth.19.Thustheyhave,intheirturn,becomethemostimportantanimalsontheplanetsontheplanet.thusadv.因此；从而

Shestudiedhard,____________________.thusshegothighmarksHeforgottoturnontheradioand________________________.thusmissedtheprogram

2)Inone’sturn轮到某人Itwillbe_______________tobeondutytomorrow.inSam'sturn20.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichprevents