过去进行时微课课件.pptx

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1、一、定义：过去某一时间正在进行的动作。二、与现在进行时的异同：现在进行时的构成为：主语 十助动词am/is/are十动词的现在分词。I was having dinner with my friends at this time yesterday.You were having a math class at this time yesterday.第1页/共9页主语 十助动词was(were)十动词的现在分词三、构成：四、标志词：at this time yesterday,at that time,at five last Sunday,the whole morning,all tha

2、t day,then,last night,以及when,while引导的时间状语从句。第2页/共9页五、用法（一）、过去某一时刻正在进行或发生的动作。当老师进来时你们正在干什么？老师进来时他正在读书。他在读书时，我在写作业。（二）、过去某个时间前后两个动作是同时进行的。For example:What were you doing when the teacher came in？He was reading books when the teacher came in.While he was reading books,I was doing my homework.特别注意：when

3、与while 的区别二者都有“当时”的意思，但while 后只能跟延续性动词（即后面可加ing的动词），而when 后既可跟延续性动词，又可跟非延续性动词，所有动词均可。第3页/共9页（三）、描述一件事发生的背景，一个长动作发生时，另一个短动作在发生。For example:My brother fell while he was riding a bike.我哥哥骑自行车时，摔倒了。It was snowing when he left school.他离开学校时，天在下雪。第4页/共9页（四）、常与always连用，表埋怨、责怪、表扬和喜欢等感情。My father was always

4、smoking when she was young.我父亲年轻时，总是抽烟。I remembered She was often smiling when I talked to her.我记得当我和她说话时经常微笑。For example:第5页/共9页Exercise1.When I arrived at his office,he _on the phone.A.was talking B.talkedC.talk D.talks 2.-I called you yesterday evening,but nobody answered the phone.-Oh,I_ a walk

5、with my parents at that time.A.took B.was taking C.am talking D.take第6页/共9页 3.They _(在买衣服）when the UFO arrived.4.What _ you_ when you _ the alarm?(当听到警报的时候,你在干什么?)were buying clothesweredoingheard第7页/共9页 While What were they doing yesterday afternoon?He was playing basketball while she was sleeping.第8页/共9页感谢您的观看！第9页/共9页