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1、新人教选修7-Unit3语法讲解课件(not)doing(not)beingdone(not)havingdone(not)havingbeendone二:V-ing可作主语、宾语、表语;定语、状语和宾语补足语，但不能单独作谓语。V-ing形式表示的动作与主要动词同时发生或发生在主要动词之后，用其一般式;V-ing形式表示的动作在主要动词之前发生，用其完成时，在具体应用中也常以一般式代替完成式。2).V-ing形式和不定式都要有对称性;当主语是不定式时，表语也用不定式；反之，当主语是V-ing形式时，表语也用V-ing形式。Toseeistobelieve.=Seeingisbe
2、lieving.注意3).It’snouse(good)doingsthIt’sawasteoftimedoingsthit作形式主语,只用V-ing,不用不定式。※Itis+adj.+(forsb)todosthItisnousecryingoverspiltmilk.覆水难收。Itisawasteoftime___________(talk)tohim.Itisimportantforme_______________(learn)English.talkingtolearn3.作宾语V-ing形式既可作动词的宾语,也可作介词的宾语。★Wewouldappreciatehea
3、ringfromyou．我们会珍惜你的来信。★Thebirdescaped______________(catch).★Ifeellike__________(join)thearmy.★Hewasafraidof____________(abandon)byus.beingabandonedbeingcaughtjoining注意：在avoid,admit,appreciate,consider,delay,enjoy,escape,excuse,finish,forgive,imagine,mind,miss,practise,risk,suggest,giveup,puto
4、ff,feellike,insiston,insteadof,lookforwardto,objectto,keepon等后只接V-ing形式作宾语。避免错过少延期建议完成多联系喜欢想象禁不住承认否定与嫉妒逃避冒险莫原谅忍受保持不介意注意①在want，need，require，deserve等动词之后作宾语时，常用动名词的主动式表示被动意义。Yourcarneedsfilling.你这车要充气了。Thiscitydeservesvisiting.这座城市值得光顾一下。Theproblemrequiresstudyingcarefully.这个问题需要认真研究。Thetreeswa
5、ntwatering.这些树需要浇水了。②在（be）worth后面只能用动名词的主动态来表示被动意义。Hissuggestionisworthconsidering.Thebookisworthreading.③在allow，advise，forbid，permit等动词后直接跟动名词形式作宾语，如果后面有名词或代词作宾语，其后用动词不定式作宾语补足语。如：Wedon’tallowsmokinghere.Wedon’tallowstudentstosmoke.1.Sorry,wedon’tallow__________inthelectureroom.A.tosmokeB.smo
6、keC.smokingD.tosmoking2..Theydon’tpermit__________noiseher.A.tomakeB.makeC.makingD.made3.Thesentencewants__________oncemore.A.toexplainB.explainingC.beingexplainedD.tobeexplainedit4.Thesquirrelwasluckythatitjustmissed__________.A.catchingB.tobecaughtC.beingcaughtD.tocatchExercises4.作定语＊Thegir
7、lstandingthereismysister.＊Thisisapieceof__________(surprise)news.＊Theproblem____________(discuss)nowisveryimportant.＊Thefarmers____________(work)inthefieldsaretired.surprisingbeingdiscussedworking5.作状语◆Hearingthegoodnews,hejumpedwithjoy.◆Hesa
