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.
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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 friend last night.
汤姆昨晚一直在给他的朋友写信。（信不一定写完，只是强调了动作的延续性）。
过去进行时和一般过去时的差别：
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”。
例如： I was reading an English novel last night. 昨晚我在看一本英文小说。（可能没看完）
I read an English novel last night 我昨晚看了一本英文小说。（已经看完）
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过去进行时练习
二、 用动词的适当形式填空。
1. While we __________ (wait) for the bus, a girl __________ (run) up to us. 2. I __________ (telephone) a friend when Bob __________ (come) in. 3. Jim __________ (jump) on the bus as it __________ (move) away.
4. We __________ (test) the new machine when the electricity __________ (go) off.
5. She __________ (not want) to stay in bed while the others ________________ (all, work) in the fields.
6. While mother ________ (put) Cathy to bed, the door bell ________ (ring). 7. As I __________ (walk) in the park, it __________ (begin) to rain.
8. Even when she ___________ (be) a child she ________________ (already, think) of becoming a ballerina (芭蕾舞演员).
9. It was quite late at night. George __________ (read) and Amy __________ (play) her needle when they __________ (hear) a knock at the door.
10. There __________ (be) a group round the fire when they __________ (reach) it. An old woman __________ (sit) on the ground near the kettle; two small children __________ (lie) near her; a donkey __________ (bend) his head over a tall girl. 1. I _____ (have) my breakfast at half past six yesterday morning.
2. Mary _____ (go) over her lessons from six to seven last night. John and peter ____(do) the same thing.
3. What _____ you ___ (do) at that time? We _____ (watch) TV.
4. Was your father at home yesterday evening? Yes ,he was. He _____ (listen) to the radio. 5. They _____(not make) a model ship when I saw him.
6. _____ they ____ (have) a meeting at 4 yesterday afternoon? No, they _____. They _____ (clean) the classroom.
7. ______ it ______(rain) when you left school? Yes, it ____. (No, it ____) 8. What _____ your father _____ (do) when he was your age?
9. One day, Edison _____ (wait) for a train to arrive, and suddenly a little boy ran to the track(轨道) to play.
10. He asked me if I ______ (go) fishing that afternoon.
11. The three of them were in a hurry because their plane _____ (leave) in five minutes. 12. In a letter, john told us that he _____ (come) to china next month. 13. When the bell rang, jenny _____ (wait) in her seat. 14. She _____ (make) her dress the whole afternoon.
15. While my father ____ (look) through the evening paper, he suddenly ____ a cry. 16. When I ____ (come) in the room, he ____ (see) me, for he ____ (read) something
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初小学过去进行时讲解练习及答案
