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Unit8NaturaldisastersGrammar123DescribethepicturesusingthesentencesfromTheTaiwanEarthquake.1.Iwassleepingwhentheearthquakestar

ted.2.Peoplewererunninginalldirectionswhilepiecesofglassandbrickswerefallingdown.3.AsIwastryingtofindmywayout,Isuddenlyhear

dsomenoiseaboveme.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.ye

sterday•昨天这时atthistime/momentyesterday•那时atthattime/moment•昨天整个早上/下午thewholemorning/afternoonyesterdayPastcontinuoustenseLookandcompleteDaniel’sd

adandhisbrother____________TVatnineyesterday.Daniel___________atthattime.Daniel’smother____________dinneratthattime.Daniel’ssister_______

___atthattime.werewatchingwassleepingwascookingwerereadingBecauseoftheCOVID-19pandemic,Daniel’sfamilydidn’tgooutsi

deyesterday.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)w

asreadingweredoingwashavingwasringingWerewaitingwaswalkingUsingwhen,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。Mostpeopleweresleepingwhentheearthquakestarted.=Whentheea

rthquakestarted,mostpeopleweresleeping.AmywasreadingwhileMilliewassleeping.(longaction)(longaction)(longaction)(longaction)When/while/asLucywasp

layingthepiano,herfathercameintotheroom.Lindawasplayingcomputergameswhenhermotherknockedatthedoor.(shortaction)(

shortaction)主句从句longlongshortshortlonglong++++whileWhile/when/aswhen长动作-v-ing短动作-did++MymotherwaswatchingTVwhileI

wasdoingmyhomework.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__________studentsweretalkin

gnoisily.=Thestudentsweretalkingnoisily_______theteachercamein.whenwhile/when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。Thelittlegirlssangastheypl

ayed.小姑娘们一边玩，一边唱。WhenarrivedwasgettingWhilewerebuildingwastakingfellwhen/while/aswasmakingwashidingwhenWhen

/While/AswereplayinghitranFillintheblankswithwhen,whileoras.1.Itbegantorain______________Lindawashavingsupper.2.Whatwereyoud

oing_____MrJacksoncameintotheclassroom?3.______________youaredriving,don’tuseyourmobilephone.4.Wewerehavin

gameeting______thelightwentoff.5.Iwaslookingafterthechild______Jennywascookinglunch.6._______Iarrivedathisoffice,he

waschattingonthephone.when/while/aswhenWhen/While/AswhenwhileWhenThankyou,Mum.Youalwaysstoodbesidemeinthepastyears._________

_____I____________(sleep),Ismeltthedeliciouseggsyouweremakingformybreakfast._______you______(come)homeafterwork,I____________(do)homeworkinmybedroom.

WhileI____________(watch)TV,you____________(cook)thedinner.________I____________(talk)onthephone,you____

________(clean)myroom.Thankyousomuchfordoingeverythingformeinthepast.Finishtheletterwiththegivenwordsandus

ewhen/while/astoconnectthesentences.wassleepingcamewasdoingwaswatchingwerecookingwastalkingwerecleaningWhen/While/AsWhenWhileThankyou！