人教英语必修三上篇

人教英语必修三上篇第1页/共24页第2页/共24页Howlifebeganontheearth?acloudofdust1.“Bigbang”2.aviolentsolidglobeproducegases3.atmospere4.waterappeared第3页/共24页5.plantsappeared6.animalsappearedproduceoxygen第4页/共24页1.Theywereintimetoproducecarbon,nitrogen,watervapourandothergases,whichweretomaketheearth'satmosphere.最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。(1)intime①最终，迟早=finally/eventually例:Ifyoukeepon,you'llsucceedintime.②及时Wewerejustintimeforthebus.WordandPhrase第5页/共24页

ontime准时例：CanwearriveinBeijingontimeornot?

innotime立刻例：We'lldoupyourcarinnotimeatall.

atnotime决不=never例：(辽宁卷)Atnotimedidtheyactuallybreaktherulesofthegame.Itwasunfairtopunishthem.

aheadoftime提前第6页/共24页allthetime一直atanytime在任何时候atatime一次，每次Itonetime曾经，同时atthesametime同时fromtimetotime时不时地，偶尔takeone'stime从容不迫，不着急

todoastimegoeson随着时间的推移第7页/共24页

2.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.很多科学家相信，由于地球上长期有水存在，它使得地球把有害气体和酸性物质溶解在海洋里。这就产生了连锁反应,使得生命有可能开始发展了。(1)主语从句，表语从句第8页/共24页例1(陕西省)Themanagerwantstoseechangesinthecompany,andIamsurehewill

.A.inparticularB.inturnC.inchargeD.intime第9页/共24页(2)atmospheren.大气层，大气

theatmosphere气氛，氛围acomfortable/pleasantatmosphere①Theteachertriestocreateanatmosphereinclass

hisstudentscanpracticetheirspeakingskills.②(福建)Shehasagiftforcreatinganatmosphereforherstudents

allowsthemtocommunicatefreelywitheachothel.A.whichB.whereC.whatDwho第10页/共24页(2)presencen.存在；出席，在场inthepresenceofsb.=insb.'spresence当着某人的面例“Rajfeelsratherawkwardinthepresenceofladies.presentadj.出席的，在场的；现在的，当前的（3）allowv.允许，许可allowdoingsth.允许做某事例：Wedont'sallowsmokinghere.allowsb.todosth.允许某人做某事例：Hewont'sallowhimselftofail.第11页/共24页(4)dissolveinto

(使)溶入，(使)溶解；(使)融化成例:Snowandicedissolveintowater(5)makeitpossibleforsb.todosth.句型：vt+(形式宾语)+adj./n+(forsb.)

todosth(可变)vt:make,think,consider;,find,feel,judge例:Idon'tthinkitnecessarytoarguewithhim.TheymakeitaruletoreadEnglishwordseveryday.Idon'tthinkitworthwhilegoingtosuchaplace.第12页/共24页例1:ThedifferenceinthicknessandweightfromtheearlierversionmakestheiPad4morecomfortable

.

AheldBholdingCbeheldD.tohold例2：Nowadayspeoplesometimesseparatetheirwastetomakeiteasierforit

.A.reusingBreusedC.reuseD.tobereused做题小技巧：去掉形式宾语it，变换成正常语序第13页/共24页3.Theymultipliedandfilledtheoceansandseaswithoxygen,whichencouragedthelaterdevelopmentofearlyshellfishandallsortsoffish.它们繁殖起来就使得海洋充满了氧气，这为早期的贝类及其他各种鱼类的发育进一步创造了条件。(1)multiplyv.乘，迅速增加；(使)繁殖例：multiply2and4togetheryouget8multi-多multiculturaladj.多元文化的multimediaadj.多媒体的multinationaladj.跨国的，多民族的第14页/共24页(2)encouragevt.①鼓励，鼓舞encouragesb.todosth.鼓励某人做某事②激励，促进Highpricesencouragedfarming.高价格刺激了农业encouragingadj.令人鼓舞的encouragementn.鼓舞，鼓励couragen.勇气discouragevt.使泄气第15页/共24页4.Theylaideggstooandexistedontheearthformorethan140millionyears.However,65millionyearsagotheageofthedinosaursended.Whytheysuddenlydisappearedstillremainsamystery.它们也生蛋，在地球上生存了1.4亿多年。然而,6500万年前，恐龙时代结束了。它们为什么会突然灭绝至今仍是个谜。词形含义过去时过去分词现在分词lie说谎liedliedlyinglie躺，位于laylainlyinglie放置；下蛋laidlaidlaying第16页/共24页(2)existvi.存在；生存existon靠…生存existencen.存在existentadj.存在的，实际的n.

例：remainabeginner（3）

adj.

例：remainsilent

doing

例：remainstandingremain+

done

例：remainuntouched

tobedone

例：remaintobeseen

介词短语例：remaininLondon第17页/共24页5.Thustheyhave,intheirturn,becomethemostimportantanimalsontheplanet.于是，他们接着成为这个行行上最重要的动物。（1）thusadv.因此，这样（2）inone'sturn轮到某人例：Whenitwasinmyturn,Iurn依次；反之，反过来byturns轮流；交替地taketurnstodosth./indoingsth.轮到某人做某事第18页/共24页(广东汕头)Aheavylearningburdenleadstounhealthybehaviorssuchaspooreatinghabits,which

damagethehealthofstudents.A.initsturnB.inreturnC.inturnD.byturns轮到它的顺序；作为回报；反之；轮流第19页/共24页6.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfrom

escapingfromtheearthintospace.他们把过多的二氧化碳释放到大气层中，这使得地球上的热不能释放到太空中去。（1）preventv.阻止，预防preventsb./sth.(from)doingsth.主动句中from可以省略，

stopsb./sth.(from)doingsth.

被动句中不能省略

keepsb./tectsb./sth.fromdoingsth.保护…免受…第20页/共24页例5：Chinarecentlytighteneditswa