英语人教版八年级下册过去进行时中when和while的区别.ppt

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1、Unit5Unit5Whatwereyoudoingwhentherainstormcame?when和while都可表示“当……的时候”，引导时间状语从句。你知道两者在过去进行时中的用法有什么不同吗？请仔细观察下面的例句，然后补全空格中的内容。过去进行时中的when和while①IwaswalkingtoschoolwhenIsawacatinatree.②WhenSallyarrivedhome,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

2、态，从句用一般过去时态。过去进行when③WhileIwassleepinginthebedroom,someoneknockedatthedoor.④Davidfellwhilehewasridinghisbike.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。一般过去while⑤WhileAndywaswaitingforthebus,hewasreadinganewspaper.⑥HewascleaninghiscarwhileIwascooking.主句和从句的动作在过去的某时

3、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_________时态。过去进行while开始下大雨的时候本在做什么？WhatwasBendoing_____itbegantorainheavily?开始下雨的时候本在帮他妈妈做晚饭。Whenitbegantorain,Ben___________hismommakedinner.whenwashelping琳达在睡觉的时候，珍妮在做什么？WhatwasJennydoing_____Lindawassleeping?琳达在睡觉的时候，珍妮在帮助玛丽做作业。_______

4、________________,JennywashelpingMarywithherhomework.whileWhileLindawassleepingWhenI…Hewasdoing…WhenIcalledhimup,hewassleeping.Makeupthesentences.WhileIwasdoing…Hewasdoing…WhileIwasreadingthenewspaper,hewaswatchingTV.Lookatthetableandwritesentenceswithbothwhileandwhen.JohnMarytakephoto

5、sbuyadrinkplaythepianoleavethehousecleanhisroomturnontheradioshoptakethecartothecarwash活学活用4a1.WhileJohnwastakingphotos,Maryboughtadrink.JohnwastakingphotoswhenMaryboughtadrink.2.WhileJohnwasplayingthepiano,Maryleftthehouse.JohnwasplayingthepianowhenMaryleftthehouse.3.WhileJohnwasclea

6、ninghisroom,Maryturnedontheradio.JohnwascleaninghisroomwhenMaryturnedontheradio.4.WhileJohnwasshopping,Marytookthecartothecarwash.JohnwasshoppingwhenMarytookthecartothecarwash.I.根据汉语意思完成下列英语句子，每空一词。1.昨天下午五点钟你哥哥在做什么？What_____yourbrother_____atfiveyesterdayafternoon?2.昨天我回到家时，我妈妈在洗衣服。My

7、mother_____________clothes________I____homeyesterday.waswashingwasdoingwhengot3.你做作业时，你妹妹在干什么？What______yoursister_____________you____________yourhomework?whileweredoingwasdoing