【文档说明】Unit8Grammar课件2022-2023学年牛津译林版英语八年级上册.pptx，共(16)页，5.502 MB，由小喜鸽上传

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Unit8NaturaldisastersGrammar123DescribethepicturesusingthesentencesfromTheTaiwanEarthquake.1.Iwassleepingwhentheearthquakestarted.2.

Peoplewererunninginalldirectionswhilepiecesofglassandbrickswerefallingdown.3.AsIwastryingtofindmywayout,Isuddenlyheardsomenoiseaboveme.

1.定义：过去进行时表示的是过去某一时刻正在进行的动作或者过去某段时间一直在进行的动作。2.结构：was/weredoing3.常见时间状语：•昨天下午3点到5点from3p.m.to5p.m.yeste

rday•昨天这时atthistime/momentyesterday•那时atthattime/moment•昨天整个早上/下午thewholemorning/afternoonyesterdayPastcontinu

oustenseLookandcompleteDaniel’sdadandhisbrother____________TVatnineyesterday.Daniel___________atthattime.Daniel’s

mother____________dinneratthattime.Daniel’ssister__________atthattime.werewatchingwassleepingwascookingwerereadingBecauseoftheCOVI

D-19pandemic,Daniel’sfamilydidn’tgooutsideyesterday.Whatweretheydoingat9a.m.yesterday?Yes,Iwas.you/we

/theywere.he/she/itwas.WasIsleepingat10p.m.lastnight?Wereyou/we/theyWashe/she/itNo,Iwasn’t.you/we/theyweren’

t.he/she/itwasn’t.Iwas(not)sleepingat10p.m.lastnight.You/We/Theywere(not)He/She/Itwas(not)wasreadingweredoingwashavingwasringingWere

waitingwaswalkingUsingwhen,whileandas•when、while和as都表示“当……的时候”。•这三个连词都可引导时间状语从句。当while,when和as放在句首时，主句和从句要用逗号隔开。Mostpeopleweresle

epingwhentheearthquakestarted.=Whentheearthquakestarted,mostpeopleweresleeping.AmywasreadingwhileMilliewassleeping.(

longaction)(longaction)(longaction)(longaction)When/while/asLucywasplayingthepiano,herfathercameintotheroom.Lindawasplayingcomputerga

meswhenhermotherknockedatthedoor.(shortaction)(shortaction)主句从句longlongshortshortlonglong++++whileWhile/when/aswhen长动作-v-ing短动作-did++Mymotherw

aswatchingTVwhileIwasdoingmyhomework.Hewastakingashowerwhilehiswifewastalkingonthephone.while引导的时间状语从句，谓

语动词只能是延续性的，通常用进行时。Theteachercamein__________studentsweretalkingnoisily.=Thestudentsweretalkingnoisily_______theteachercamein.whenwhile/wh

en当主句、从句动作同时进行，从句动作的时间概念淡化，而主要表示主句动作发生的背景条件时，只能用as。这时，as有“随着…”、“一边…，一边…”之意。Asyearsgoby,Chinaisgettingricherandstronger.

随着时间一年一年过去，中国变得越来越富强了。Thelittlegirlssangastheyplayed.小姑娘们一边玩，一边唱。WhenarrivedwasgettingWhilewerebuildingwastakingfellwhen/

while/aswasmakingwashidingwhenWhen/While/AswereplayinghitranFillintheblankswithwhen,whileoras.1.Itbegantorain______________Lindawashavingsupper.2.

Whatwereyoudoing_____MrJacksoncameintotheclassroom?3.______________youaredriving,don’tuseyourmobilephone.4.Wewerehavinga

meeting______thelightwentoff.5.Iwaslookingafterthechild______Jennywascookinglunch.6._______Iarrivedathisoffice,hewaschattingonthephone.when/while/asw

henWhen/While/AswhenwhileWhenThankyou,Mum.Youalwaysstoodbesidemeinthepastyears.______________I____________(slee

p),Ismeltthedeliciouseggsyouweremakingformybreakfast._______you______(come)homeafterwork,I____________(do)homeworkinmybedroom.Whil

eI____________(watch)TV,you____________(cook)thedinner.________I____________(talk)onthephone,you____________(clean)myroom.Thankyousomuchfordo

ingeverythingformeinthepast.Finishtheletterwiththegivenwordsandusewhen/while/astoconnectthesentences.wassleepi

ngcamewasdoingwaswatchingwerecookingwastalkingwerecleaningWhen/While/AsWhenWhileThankyou！