高二英语under the sea教案4(1)

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1、Period4　GrammarTeachingaims　　　　　1．Studentswillbeabletorecognizethe－ing/beingdoneformsandknowtheexactmeaningsofthem.2．Studentswillbeabletousethesetwoformscorrectly.Teachingprocedures　　　　　Step1　RevisionAskstudentstoanswerthefollowingquestionswithoutreferringtothetextbo

2、ok.1．WhatdidClancywitnesswhenherandowntotheshore?2．WhydidClancyruninahurry?3．WhatdidOldTomdowhentheyheadedintothebay?4．WhatdidOldTomdoafterGeorgebeatthewater?5．WhatdidClancywitnesswhentheydrewnear?Suggestedanswers：1．Hesawawhalethrowingitselfoutofthewaterandthencrashin

3、g_downagain.2．BecauseClancyhadalreadyheardthatGeorgedidn'tlikebeing_kept_waiting.3．TheycouldseeOldTomswimmingbytheboat，showingthemtheway.4．Tomcircledbacktotheboat，leadingthemtothehuntagain.5．Hecouldseeawhalebeing_attackedbyapackofaboutsixotherkillers.Next，askstudentst

4、opayattentiontotheunderlinedwordsandleadintothegrammaritem—“v.－ing”/“beingdone”．Step2　Grammarlearning1．现在分词(－ing形式)的构成。v．－ing形式由“do＋ing”构成，其否定形式是“notdoing”，v.－ing可以带宾语或状语构成v．－ing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

5、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)havingbeendone　　3.动词－ing的被动式的句法功能。(1)作主语。如：So_being_killed_by_sharkswasacommonthing.(2)作宾语，用在介词后或需要带－ing形式作宾语的动词后。如：Georgedidn'tlikebeing_kept_waiting.Hewasterrifiedofbeing_abandon

6、ed_by_us.Doyouremember_having_been_takentoBeijingattheageoften?(3)作表语。如：Whatworriedthechildmostwashisnot_being_allowed_tovisithismotherinthehospital.(4)作定语。如：Theproblembeing_discussedisofgreatimportance.(5)作状语。如：Having_been_shown_aroundthelibrary，weweretakentoseethela

7、b.(6)作补足语。如：Aswedrewcloser，Icouldseeawhalebeing_attackedbyapackofaboutsixotherkillers.Whenweapproachedhim，IsawJamesbeing_held_upinthewaterbyOldTom.[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。Theydon'tlikethe_design_of_the_new_brid

8、ge_being_built.(正在建造的桥的设计)Not_having_been_completed，themuseumcan'tbevisitedyet.(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