八年级英语上册 Unit 8 Natural disasters Grammar 2教案 （新版）牛津版.doc

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1、Unit8教学目标Tousewhen,whileandascorrectly.重、难点Tousewhen,whileandascorrectly.教学设计详案二次备课内容Step1.Showlearningaims.(1')Step2.Guidestudentstolearntousewhen,whileandasShowGuideOne1.When,whileandascanbeasconjunctionsoftime.Theyallmean“duringthetimethat”.(1).Iwassleepingwhentheearthquakestarted.(2).Pe

2、oplewererunninginalldirectionswhilepiecesofglassandbrickswerefallingdown.(3).AsIwastryingtofindmywayout,Isuddenlyheardsomenoiseaboveme.Note:Whenashorteractionhappenedatthesametimeasalongeraction,weusethepastcontinuoustenseforthelongeractionandthesimplepasttensefortheshorteraction.Whentherea

3、retwolongactions,weoftenusewhile.Iftheshorteractionisinthemainclause,wecanusewhen,whileorastojointhem.When/While/AsMilliewaswatchingTV,Andycameintotheroom.Ifthelongeractionisinthemainclause,weoftenusewhentojointhem.MilliewaswatchingTVwhenAndycameintotheroom.Exercise1:1.Mybrother____________

4、(listen)tothemusicwhilehe__________(make)amodelplane.2.Hermother___________(cook)dinnerwhenthetelephone____(ring).3.We___________(have)asportsmeetingwhileit__________(rain)yesterdayafternoon.4.Mygrandpa__________(read)thenewspaperwhenI___(leave)home.5.LingFeng___________(draw)ahorseonthebla

5、ckboardwhentheteacher_____(come)intotheclassroom.6.Peter__________(look)atsomephotoswhenI____(give)himapencil.Texplains:1.when/while/as都可以引导时间状语从句，译为“当......时候”2.when/as既可以指某一时间点，也可以指某一段时间，既从句的动词可以是延续性的，也可以是瞬间性的。而while指某一段时间，从句的谓语动词必须是延续性的。3.当两个动作在同时发生时，较长的动作要用过去进行时，而较短的动作用一般过去式。4.当有两个长动作通常

6、用while来连接。5.如果短动作在主句中，我们可以用when/while/as来连接从句。6.如果长动作在主句中，我们经常用when来连接Exercise2:翻译下列句子(sayaboutthem)(1).Iwassleepingwhentheearthquakestarted.(2).Peoplewererunninginalldirectionswhilepiecesofglassandbrickswerefallingdown.(3).AsIwastryingtofindingmyoutway,Isuddenlyheardsomenoiseaboveme.(4).My

7、fatherwasreadingnewspaperswhenIgothome.(5).WhatwereyoudoingwhileIwasringingyou?(6).When/While/AsIwaswalkinginthestreet,acarcaughtfire.(7).When/Asacarcaughtfire,Iwaswalkinginthestreet.(8).Rubywasreadingabookwhilehismotherwascooking.作业设计Practiceinclass（101