人教版 八年级 下册 英语 UNIT 5《课时 3　Section A(Grammar Focus-4c)》教案

课时3SectionA(GrammarFocus-4c)课时教学目标1.能够用过去进行时谈论过去正在发生的事情。2.能够分辨when和while引导时间状语从句时的不同用法。教学过程Step1Lead-in1.Showstudentsapictureandamotheriscookinginthepicture.Askstudents“Whatwasyourmotherdoingwhenyougothomeyesterday?”andhelpstudentstoanswer“Shewascooking.”2.Tellstudents“Shewascooking.”isasentenceusingthepastprogressivetense.Step2WorkonGrammarFocus1.Tellstudentswearegoingtolearnmoresentencesusingthepastprogressivetense.Askstudentstoworkinpairsandpracticereadingthesentencesintheform.Oneasksandtheotheranswers.Thenasksomepairstoactthemoutinclass.2.Askseveralstudentswhattheyknowaboutthepastprogressivetense.3.Explaintheusageofthepastprogressivetensetostudents.（针对训练习题见上课课件PPT）(1)定义：过去进行时表示在过去某一时刻或某一段时间正在进行的动作。(2)结构：was/were+v.-ing。(3)部分时间标志①atthattime,atthistimeyesterday②from…to…+过去的时间，如：fromseventoninelastnight③at+钟点+过去的时间，如：ateightyesterday④thewholemorning/afternoon/…⑤when/while引导的时间状语从句(4)句式结构：肯定句：主语+was/were+doing+过去的时间状语或时间状语从句。否定句：主语+was/were+not+doing+过去的时间状语或时间状语从句。一般疑问句：Was/Were+主语+doing+过去的时间状语或时间状语从句？特殊疑问句：特殊疑问词+was/were+主语+doing+过去的时间状语或时间状语从句？4.Askstudentstopayattentiontothesentencesconductedbywhenandwhile.Andthentellthedifferencesbetweenwhileandwhen.（针对训练习题见上课课件PPT）(1)词义不同：while表示“在……期间”，指一段时间。when既可以指时间点，也可指一段时间。(2)从句谓语动词不同：while引导的从句的谓语动词必须是延续性动词。when引导的从句的谓语动词可以是延续性动词，也可以是非延续性动词。(3)强调的重点不同：while强调主句的动作和从句的动作同时进行。when引导的从句的动作和主句的动作可以是同时发生，也可以是先后发生。(4)时态不同：如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导；含when引导的时间状语从句的主从复合句，句子时态遵循“主将从现”的原则。Step3Workon4a1.Askstudentstolookatthetablefirst,andthenaskstudentstoreadthesamplesentencestogether.2.Askseveralstudentstowritetheirsentenceswithbothwhileandwhenontheblackboard.3.Checktheanswers.TextbookAnswers·WhileJohnwastakingphotos,Maryboughtadrink./JohnwastakingphotoswhenMaryboughtadrink.·WhileJohnwasplayingthepiano,Maryleftthehouse./JohnwasplayingthepianowhenMaryleftthehouse.·WhileJohnwascleaninghisroom,Maryturnedontheradio./JohnwascleaninghisroomwhenMaryturnedontheradio.·WhileJohnwasshopping,Marytookthecartothecarwash./JohnwasshoppingwhenMarytookthecartothecarwash.Keypoints1.takephotos拍照2.turnontheradio打开收音机【拓展】turnoff关闭Step4Workon4b1.Askstudentstofillintheblankswithwas,were,whenorwhile.2.Askseveralstudentstoreadthetextsentencebysentence.3.Checkiftheiranswersareright.TextbookAnswersWhile;was;was;While;When;was;was;wereKeypoints1.havealook看一看2.inbadshape变形；状况不好Step5Workon4c1.Letstudentsworkinpairs.FirstasktheirpartnerswhattheyweredoingatthesetimeslastSunday,andthenfillinthechart.2.Askstudentstomakedialoguesimitatingtheonein4cwiththeinformationtheyhavewrittendown.3.Askseveralpairstoactouttheirdialoguesinclass.Keypointsbekidding在开玩笑教学效果评价通过观察、讨论、归纳等课堂活动，学生能够探究和总结出过去进行时的用法并分辨when与while引导的时间状语从句的用法区别，思维的逻辑性得到提高，语言表达更加准确。作业完成《点拨训练》UNIT5课时3SectionA(GrammarFocus—4c)的练习。教学笔记________________________________________________________________________________________________________