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《高二选修7_Unit_3_Under_the_sea语法讲解课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Theuseof-ing语态时态主动形式被动形式一般式完成式(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。V-ing的用法：1.作主语★Swimmingisgoodforhealth.★___________(raise)yourhattoaa
2、ladyisgoodmanners.对一位女士脱帽致敬是礼貌的。★____________(kill)bysharksintheseaisacommonthing.RaisingBeingkilled2.作表语☆Teachingislearning.教学相长．☆Myhobbyis__________(make)modelplanes.☆Whatworriedthechildmostwas_________(not,allow)tovisithismotherinthehospital.makingnotbeingallowed注意：动名词和不定式都可以作
3、主语，动名词作主语表示一般或抽象的多次性行为，不定式作主语往往表示具体的或一次性的动作。如：Playingwithfireisdangerous.（泛指玩火）Toplaywithfirewillbedangerous.（指一具体动作）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.=Seeingisbelieving.注意3).It’snouse(good)doingsthIt’sawasteoftimedoingsthit作形式主语,只
4、用V-ing,不用不定式。※Itis+adj.+(forsb)todosthItisnousecryingoverspiltmilk.覆水难收。Itisawasteoftime___________(talk)tohim.Itisimportantforme_______________(learn)English.talkingtolearn_____theexamwilldisappointyourparents. A.YoufailingB.YourfailingC.YoufailD.Youtofail.2._____thesamemistakea
5、gainmadehisparentsveryangry. A.HisbeingmadeB.HehasmadeC.HehadmakingD.Hismaking3.Idon'tthinkit'smuchgood_____tohim. A.writingB.towriteC.writeD.written4.Suchbooksarenotworthy_____atall. A.ofbeingreadB.beingreadC.readingD.toread5.Itisnouse________withoutthrough_________.A.toread;und
6、erstoodB.reading;understandingC.toread;understandD.read;tounderstandExercises3.作宾语V-ing形式既可作动词的宾语,也可作介词的宾语。★Wewouldappreciatehearingfromyou．我们会珍惜你的来信。★Thebirdescaped______________(catch).★Ifeellike__________(join)thearmy.★Hewasafraidof____________(abandon)byus.beingabandonedbeing
7、caughtjoining注意：在avoid,admit,appreciate,consider,delay,enjoy,escape,excuse,finish,forgive,imagine,mind,miss,practise,risk,suggest,giveup,putoff,feellike,insiston,insteadof,lookforwardto,objectto,keepon等后只接V-ing形式作宾语。Exercises1.Thethiefenteredtheroomwithout_____. A.noticingB.being
8、noticedC.havingnoticedD.havingbeennotice
