1、Unit 8 Natural disastersGrammar123Describe the pictures using the sentences from The Taiwan Earthquake.1.I was sleeping when the earthquake started.2.People were running in all directions while pieces of glass and bricks were falling down.3.As I was trying to find my way out,I suddenly heard some no
2、ise above me.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/were doing3.常见时间状语：昨天下午3点到5点 from 3 p.m.to 5 p.m.yesterday昨天这时 at this time/moment yesterday那时 at that time/moment昨天整个早上/下午 the whole morning/afternoon yesterdayPast continuous tenseLook and completeDaniels dad and his brother _ TV at
3、 nine yesterday.Daniel _ at that time.Daniels mother _ dinner at that time.Daniels sister _ at that time.were watching was sleeping was cooking were readingBecause of the COVID-19 pandemic,Daniels family didnt go outside yesterday.What were they doing at 9 a.m.yesterday?Yes,Iwas.you/we/theywere.he/s
4、he/itwas.WasIsleeping at 10 p.m.last night?Wereyou/we/theyWashe/she/itNo,Iwasnt.you/we/theywerent.he/she/itwasnt.Iwas(not)sleepingat 10 p.m.last night.You/We/Theywere(not)He/She/Itwas(not)was readingwere doingwas havingwas ringingWerewaitingwas walkingUsing when,while and as when、while和as 都表示“当的时候”。
5、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。Most people were sleeping when the earthquake started.=When the earthquake started,most people were sleeping.Amy was reading while Millie was sleeping.(long action)(long action)(long action)(long action)When/while/as Lucy was playing the piano,her
6、father came into the room.Linda was playing computer games when her mother knocked at the door.(short action)(short action)主句主句 从句从句longlongshortshortlonglong+whileWhile/when/aswhen 长动作长动作-v-ing 短动作短动作-did+My mother was watching TV while I was doing my homework.He was taking a shower while his wife
7、was talking on the phone.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。The teacher came in _students were talking noisily.=The students were talking noisily _ the teacher came in.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。As years go by,China is getting richer and strong
8、er.随着时间一年一年过去，中国变得越来越富强了。The little girls sang as they played.小姑娘们一边玩，一边唱。Whenarrivedwas gettingWhile were building was takingfellwhen/while/aswas makingwas hidingwhenWhen/While/Aswere playinghitranFill in the blanks with when,while or as.1.It began to rain _ Linda was having supper.2.What were you
9、doing _ Mr Jackson came into the classroom?3._ you are driving,dont use your mobile phone.4.We were having a meeting _ the light went off.5.I was looking after the child _ Jenny was cooking lunch.6._ I arrived at his office,he was chatting on the phone.when/while/aswhenWhen/While/AswhenwhileWhenThan
10、k you,Mum.You always stood beside me in the past years._ I _(sleep),I smelt the delicious eggs you were making for my breakfast._ you _(come)home after work,I _(do)homework in my bedroom.While I _(watch)TV,you _(cook)the dinner._ I _(talk)on the phone,you _(clean)my room.Thank you so much for doing everything for me in the past.Finish the letter with the given words and use when/while/as to connect the sentences.was sleepingcamewas doingwas watchingwere cookingwas talkingwere cleaningWhen/While/As When WhileThank you！
