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　　period4grammarteachingaims1studentswillbeabletorecognizetheingbeingdoneformsandknowtheexactmeaningsofthem。2studentswillbeabletousethesetwoformscorrectly。teachingproceduresstep1revisionaskstudentstoanswerthefollowingquestionswithoutreferringtothetextbook。1whatdidclancywitnesswhenherandowntotheshore？2whydidclancyruninahurry？3whatdidoldtomdowhentheyheadedintothebay？4whatdidoldtomdoaftergeorgebeatthewater？5whatdidclancywitnesswhentheydrewnear？suggestedanswers：1hesawawhalethrowingitselfoutofthewaterandthencrashingdownagain。2becauseclancyhadalreadyheardthatgeorgedidntlikebeingkeptwaiting。3theycouldseeoldtomswimmingbytheboat，showingthemtheway。4tomcircledbacktotheboat，leadingthemtothehuntagain。5hecouldseeawhalebeingattackedbyapackofaboutsixotherkillers。next，askstudentstopayattentiontotheunderlinedwordsandleadintothegrammaritemv。ingbeingdonestep2grammarlearning1现在分词（ing形式）的构成。ving形式由doing构成，其否定形式是notdoing，v。ing可以带宾语或状语构成ving短语，没有人称和数的变化，但有时态和语态的变化。2动词ing形式的被动式分一般式和完成式：（1）一般式：表示这个被动的动作正在进行或与谓语表示的动作同时发生。（2）完成式：强调这个被动的动作在谓语动词所表示的动作之前完成。语态时态主动语态被动语态一般式（not）doing（not）beingdone完成式（not）havingdone（not）havingbeendone3。动词ing的被动式的句法功能。（1）作主语。如：sobeingkilledbysharkswasacommonthing。（2）作宾语，用在介词后或需要带ing形式作宾语的动词后。如：georgedidntlikebeingkeptwaiting。hewasterrifiedofbeingabandonedbyus。doyourememberhavingbeentakentobeijingattheageoften？（3）作表语。如：whatworriedthechildmostwashisnotbeingallowedtovisithismotherinthehospital。（4）作定语。如：theproblembeingdiscussedisofgreatimportance。（5）作状语。如：havingbeenshownaroundthelibrary，weweretakentoseethelab。（6）作补足语。如：aswedrewcloser，icouldseeawhalebeingattackedbyapackofaboutsixotherkillers。whenweapproachedhim，isawjamesbeingheldupinthewaterbyoldtom。〔注意〕（1）v。ing形式的被动式主要在句子中作状语、宾语补足语和定语。但v。ing形式的被动式的完成式，一般在句中作状语（偶尔作非限定定语），不作其他成分。theydontlikethedesignofthenewbridgebeingbuilt。（正在建造的桥的设计）nothavingbeencompleted，themuseumcantbevisitedyet。（由于没有完工）（2）v。ing形式的被动式逻辑主语（即动作的承受者）如果也是主句的主语，就不需要表示出来，但是如果逻辑主语不是主句的主语，就得把v。ing形式自己的主语表示出来。如：thewholeclassroomhavingbeencleaned，thestudentswenthomehappily。（3）在want，need，deserve，require，repay，bear，take等动词及形容词worth后，习惯用动词ing的主动形式表示被动意义，相当于tobedone。如：thehousewantscleaning。这房屋需要打扫。mywatchneedsrepairing。我的手表需要修理。thewaydeservesmentioning。这个方法值得一提。theseyoungtreeswillrequirelookingaftercarefully。这些小树需要细心照顾。thefilmisworthseeing。这部影片值得一看。step3exercises句型转换（改成带ing形式被动结构的简单句）（1）thehotelwhichisbeingbuiltnowbesidetheparkwasdesignedbyagroupofyoungmen。（2）thelittlegirlwaseventuallyawarethatherparentsabandonedherinthemountainousvillage。（3）hewouldcomeevenifwedontinvitehim。（without）（4）afterhehadbeenexaminedseveraltimes，hewastoldtobehealthy。（5）inoticedthatsomepeopleweretakentothepolicestation。suggestedanswers：（1）thehotelbeingbuiltnowbesidetheparkwasdesignedbyagroupofyoungmen。（2）thelittlegirlwaseventuallyawareofbeingabandonedbyherparentsinthemountainousvillage。（3）hewouldcomewithoutevenbeinginvited。（4）afterhavingbeenexaminedseveraltimes，hewastoldtobehealthy。（5）inoticedsomepeoplebeingtakentothepolicestation。step4drillingaskstudentstodoexercise1onpage23andcheckwiththeirpartnersthenchecktogether。askstudentstodoexercise2andchecktheanswerstogether。keys：1。beingattacked2。beingheldup3。beingincluded4。havingbeenaccepted5beingtold6。beinghelpedout7。beingtaken8。beingphotographed9。beingswallowed。step5usingstructuresshowstudentsthe6picturesonpage64andaskthemtodescribethemusingthepassiveingforminpairs。keys：1。beinginvited2。beingkeptwaiting3。beingattacked4。beingawarded5。beingshoutedat6。beingblamedstep6homeworkfinishoffexercise2onpage64。