过去进行时之when-和while的区别PPT课件

.,1,李华蓉老师过去进行时中的when和while,湖南省石门县澧斓中学,.,2,rammar,.,3,WhatwasJayChoudoingat8thismorning?Hewas,.,4,Hewasrunning.,.,5,from8to9yesterdaymorning,ShewashavingaChineseclass.,.,6,WhenJimcalledhimup,WhenJimcalledhimup,hewassleeping.,.,7,WhileTomwalkedtoschool,WhileTomwalkedtoschool,hewaseating.,.,8,?,.,9,IwaswalkingtoschoolwhenIsawacatinatree.WhenSallyarrivedhome,hermotherwascleaningthehouse.主句的动作是持续性的，而从句动作是短暂性的，此时用_引导时间状语从句，主句用_时态，从句用一般过去时态。,when,过去进行,（一）,.,10,WhileIwassleepinginthebedroom,myfathercamein.Davidfellwhilehewasridinghisbike.主句的动作是短暂性的，从句的动作是持续性的，此时用_引导从句，主句用_时态，从句用过去进行时态。,while,一般过去,（二）,.,11,WhileAndywaswaitingforthebus,hewasreadinganewspaper.HewascleaninghiscarwhileIwascooking.主句和从句的动作在过去的某时刻或某段时间同时发生，而且动作都是持续性的，此时用_引导从句，而且主句和从句都用_时态。,while,过去进行,（三）,.,12,Exercise,whenorwhile?1._thetelephonerang,hewasreading._hewasreading,thetelephonerang.2.Bobwassleeping_hismotherwascooking.3.Iwasstudyinghere_therainstormcame.4.Dontuseyourphone_youaredriving.,When,短暂性,While,延续性,while,同时发生,when,延续性,while,短暂性,对照关系,.,13,when和while用法小结,主句的动作是持续性的，而从句动作是短暂性的，此时用引导时间状语从句，主句用，从句用一般过去时态.,主句的动作是短暂性的，从句的动作是持续性的，此时用引导从句，主句用时态，从句用过去进行时态.,when,过去进行时态,while,一般过去,.,14,when和while用法小结,主句和从句的动作在过去同时发生，而且动作都是持续性的，此时用引导从句,而且主句和从句都用时态。,while,过去进行,.,15,Homework,Fillintheblanks.1.What_you_(do)at9yesterday?2.I_(watch)TVwhenmymother_(come)in.3.He_(do)hishomeworkat9thismorning.4.Thechildren_(play)soccerat