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1、Unit4BodylanguageGrammar一:V-ing形式由“do＋ing”构成,其否定形式是“notdoing”,没有人称和数的变化,但有时态和语态的变化。GrammarV-ing形式(not)doing(not)beingdone(not)havingdone(not)havingbeendoneEg.Hearingthebell,thestudentsbegantoentertheclassroom.听见铃声，学生们开始走进教室。（听见和进入两个动作同时发生）Thebuildingbeingbu
2、iltnowisournewlibrary.现在正在建造地这栋楼房室我们地新图书馆（beingbuilt为现在分词的被动形式，表示动作正在进行之中。）Havingdonethework,hewenthome.完成了工作，他就回家了。V-ing形式在句中作定语和状语是本单元的学习重点。1.作定语V-ing形式可以单独充当名词的前置修饰语,这时有两种情况。-ing形式表示“供作......之用”的意思,这类作定语的-ing形式，叫动名词。e.g.aswimmingpool=apoolforswimmingasle
3、epingcar=acarforsleeping2)-ing形式表示“......的”意思,叫现在分词。e.g.asleepingchildworkingpeopletherisingsun-ing形式短语作定语时一般放在它所修饰的名词之后,相当于一个定语从句。e.g.1.Theyarevisitors(whoare)comingfromseveralcountries.2.Theboy(whois)standingthereisaclassmateofmine.Practice:____dogsseldom
4、bite.BarkB.TobarkC.BarkedD.Barking(2)Thewolfspokeina_____voiceandMr.Dongguofelt______.frightening;frightenedB.frightened;frightenedC.frighten;frighteningD.frightening;frighteningDA(3)It’spleasuretowatchthefaceofa____baby.asleepB.sleepC.sleepingD.slept(4)The
5、____buildingsshowedusthatanearthquakewascoming.A.shakingB.shookC.shakenD.shakeCAReadthesentencesfromthetext,thenpointoutthefunctionofredwords.Isawseveralyoungpeopleenterthewaitingarealookingaroundcuriously.2.Istoodforaminutewatchingthemandwenttogreetthem.3.
6、Shesteppedbackappearingsurprised…4.ThenAkiraNagatafromJapancameinsmiling,togetherwith…5.…,sherecognizedTonyGarcia’ssmilingface.attributiveadverbialadverbialadverbialattributive现在分词做状语二、-ing形式作状语-ing短语在句子中可作状语，来修饰谓语动词或整个句子，表示动作发生的时间、原因、条件、结果、让步或伴随等情况。-ing短语作
7、状语一般表示一个次要的动作，一般都可以变为相应的状语从句或并列句。1.作时间状语-ing短语作时间状语要置于句首。如：Hearingthebadnews,theycouldn’thelpcrying.=Whentheyheardthebadnews,theycouldn’thelpcrying.当听到这个不幸的消息时，他们情不自禁地哭了起来。Havingreceivedhisletter,Idecidedtowriteback.=AfterIhadreceivedhisletter,Idecidedtowri
8、teback.收到他的信后，我决定给他回信。2.作原因状语-ing短语作原因状语置于句首。如：Beingsoangry,hecouldn’tgotosleep.=Becausehewassoangry,hecouldn’tgotosleep.因为太生气了，他不能入睡。HavingbeentotheGreatWallmanytimes,hedidn’tgolastweek.=Because(As)he
