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1、THEENVIRONMENT-ingformGrammarandusage2课题导入Hearingthegoodnews,wewereallexcited.(表示时间)Beinghonest,hewillnevercheathermotherforever.(表示原因)Functionasanadverb学习目标1.Toknowtheverb-ingcanexpressthetime,thereason,theresultandthecondition.2.Tohavetheopportunitytopractiseusingverb-ingphrases.预习指
2、导用括号中动词的适当形式填空。1._____(know)thattherewasadogoutside,thelittleboydidn’topenthedoor.2.Thecouplewentshopping,________theireldestdaughteraloneathome.3.Time____(permit),Iwillmeetyouforlunch.探究一V-ing作状语1.作时间状语Hearingthebadnews,theycouldn’thelpcrying.=Whentheyheardthebadnews,theycouldn’thelp
3、crying.用doing形式：分词的动作与谓语动词的动作同时发生或谓语动词的动作紧接着分词发生。Havingreceivedhisletter,Idecidedtowriteback.=AfterIhadreceivedhisletter,Idecidedtowriteback.用havingdone形式：分词的动作发生在谓语动词之前。2.作原因状语Beingsoangry,hecouldn’tgotosleep.=Becausehewassoangry,hecouldn’tgotosleep.HavingbeentotheGreatWallmanytimes,
4、hedidn’tgolastweek.=Because(As)hehadbeentotheGreatWallmanytimes,hedidn’tgolastweek.3.作结果状语Thecouplewentshopping,leavingtheireldestdaughteraloneathome.=Thecouplewentshopping.Asaresult,theylefttheireldestdaughteraloneathome.Thefactorykeepsgivingoffsmoke,makingtheairdirty.=Thefactorykeep
5、sgivingoffsmoke.Asaresult,theairismadedirty.4.作条件状语Workinghard,youwillsucceed.=Ifyouworkhard,youwillsucceed.Beinggivenmoreattention,thetreescouldhavegrownbetter.=Iftheyhadbeengivenmoreattention,thetreescouldhavegrownbetter.5.作让步状语常与evenif,though连用。如：Thoughworkingfrommorningtillnight,h
6、isfatherdidn’tgetenoughfood.=Althoughhisfatherworkedfrommorningtillnight,hedidn’tgetenoughfood.6.作伴随状语Theycameintotheclassroom,singingandlaughing.=Theysangandlaughed.Theycameintotheclassroom.探究二动词-ing形式在句中作状语时，其逻辑主语与主句的主语保持一致。Ifplayingallday,youwillwasteyourvaluabletime.=Ifyouplayalld
7、ay,youwillwasteyourvaluabletime.Thoughrainingheavily,itclearedupverysoon.=Thoughitwasrainingheavily,itclearedupverysoon.探究三现在分词的否定式not+verb-ingNotknowinghowtodyethesilkred,hewenttoherforhelp.Nothavingheardfromhersonforalongtime,themotherworriedagreatdeal.课堂小结:现在分词可作时间状语，原因状语、结果状语、条件状语
8、，让步状语
