Unit2TheenvironmentGrammarandusage2教材：牛津高中英语(模块五)高二上学期文档内容：教学设计—教案单元：Unit2Theenvironment板块：Grammar2Thoughtsonthedesign:本节课是本单元Grammar的第二课时，内容是现在分词短语，目的是让学生了解现在分词短语在句中作状语，可表示时间，原因，结果，条件等。非谓语动词在高中语法的学习中占了十分重要的地位，也是学生在学习中比较难掌握的一项语法内容。因此课时的设计上，由易到难，让学生在其轻松愉快的环境中掌握所学的内容。Teachingaims:Afterlearningthissection,thestudentswillbeableto:1.knowtheverb-ingcanexpressthetime,thereason,theresultandthecondition.2.havetheopportunitytopractiseusingverb-ingphrases.Teachingprocedures:Step1Revision(PPT4)Revisionoffunctionsofverb-ingformasattribute,predicative,objectcomplement[Explanation]课前对上一课时内容回顾，以促进学生对现在分词在句中作定语、表语和宾语补足语作用的掌握。Step2Adverbial(PPT5-14)①Seeingtheteacherenteringtheroom,thestudentsstoodup.②Beingastudent,hewasinterestedinsports.③Havingwrittentheletter,Johnwenttothepostoffice.现在分词作状语时，注意如下三点：1.相当于相应的从句(PPT6-8)Rewritesentences1)Becauseheknewthattherewasadogoutside,thelittleboydidn’topenthedoor.=Knowingthattherewasadogoutside,thelittleboydidn’topenthedoor.（原因）2)Thecouplewentshopping.Asaresult,theylefttheireldestdaughteraloneathome.=Thecouplewentshopping,leavingtheireldestdaughteraloneathome.(结果）3)Timepermitting,Iwillmeetyouforlunch.=Iftimepermits,Iwillmeetyouforlunch.(条件)4)Askingaround,Ifindmanypeoplewillingtopayslighthigherpricesforthingsthatareenvironmentally.=whenIaskaround,Ifindmanypeoplewillingtopayslighthigherpricesforthingsthatareenvironmentally.（时间）2.分词的逻辑主语就是全句的主语（PPT9-10）Hetraveledontheplanelikethis,keepingthetortoisehiddeninablanket.(keeping的逻辑主语和句子的主语一致，都是he)_______throughthepark,beautifulflowerscouldbeseeneverywhere.(B)A.WalkingB.WhenIwalkedC.WalkD.Walked3.现在分词作状语时有不同的时态与语态（PPT11-14）1)完成主动式Havingfinishedherhomework,shewenttobed.Havingheardthis,thewomanastronautexpressedhersatisfaction.分词所表示的动作发生在句中谓语动词所表示的动作之前，一般在句中作时间或原因状语用，不能做定语用。2)一般被动式表示正在发生的被动动作,在句中作定语或状语。Thecarbeingrepairedismine.＝Thecarwhichisbeingrepairedismine.Beingrepaired,thecarcan’tbeused.＝As/Becauseitisbeingrepaired,thecarcan’tbeused.3)完成被动式表示发生在谓语动作之前的被动动作，在句中多作状语，不能作定语。Havingbeenpraisedasecondtime,Idecidedtomakestillgreaterprogress.Havingbeenaskedtostay,Icouldn’tverywellleave.[Explanation]通过句型转化的练习引导学生掌握现在分词相当于相应从句的功能；以易错题，巩固学生对于分词的逻辑主语就是全句主语这一知识点的学习；并以例句一一说明现在分词作状语时的不同语态与时态。Step3extensions(PPT15-16)1.非谓语动词的否定式均为not+非谓语动词现在分词的否定形式not+现在分词（完成的否定式not放在having之前）Notknowinghowtodyethesilkred,hewenttoherforhelp.Nothavingheardfromhersonforalongtime,themotherworriedagreatdeal.2.一些独立结构：①Generallyspeaking(speak),wehavelearntalotinthisschool.②Judging(judge)fromhisappearance,heissomebody.③Totell(tell)youthetruth,yourworkisterrible.[Explanation]针对现在分词的其他重点、难点在理解的基础上进行适当扩充。Step4exercises(PPT17-21)1.Story-telling2.Multiplechoices[Explanation]练习的设置由易到难，并以story-telling的形式引起学生的兴趣。
