1 1 过去进行时的讲与练 过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作,常和表过去的时间状语连用,如: I was doing my homework at this time yesterday.昨天的这个时候我正在做作业。 They were waiting for you yesterday.他们昨天一直在等你。 过去进行时的构成: 肯定形式:主语+was/were+V-ing 否定形式:主语+was not (wasn't)/were not (weren't)+V-ing 疑问形式:Was/Were+主语+V-ing。 基本用法: 1.过去进行时表示过去某一段时间或某一时刻正在进行的动作。常与之连用的时间状语有,at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+ 点钟+yesterday (last night / Sunday…),when sb. did sth 等时间状语从句,如: What were you doing at 7p.m. yesterday? 昨天晚上七点你在干什么? I first met Mary three years ago. She was working at a radio shop at the time. 我第一次遇到玛丽是在三年前,当时她在一家无线电商店工作。 I was cooking when she knocked at the door. 她敲门时我正在做饭。 2. when 后通常用表示暂短性动词,while 后通常用表示持续性动词,因此它所引导的状语从句中,谓语动词常用进行时态,如: When the car exploded I was walking past it.= While I was walking past the car it exploded. 3.when 用作并列连词时,主句常用进行时态,从句则用一般过去时,表示主句动作发生的过程中,另一个意想不到的动作发生了。如: I was walking in the street when someone called me. 我正在街上走时突然有人喊我。 4. when 作并列连词,表示“(这时)突然”之意时,第一个并列分句用过去进行时,when 引导的并列分句用一般过去时。如: I was taking a walk when I met him. 我正在散步,突然遇见了他。 We were playing outside when it began to rain. 我们正在外边玩,这时下起雨来了 一般过去时与过去进行时的用法比较: 一般过去时表示“在过去某个时间发生的动作或存在的状态”,而过去进行时则表示“在过去某个特定时间正在进行的动作”。 如:Tom wrote a letter to his friend last night. 汤姆昨晚给他的朋友写了封信。(信写完了) Tom was writing a letter to his frien...