过去进行时

回忆：正在做某事(be动词(am is are)+动词ing形式)

过去某时刻正在做某事(be动词(was were)+动词ing形式)

动词的ing形式叫做动词的现在分词，其变化规则是(1-4)：

1. 一般情况直接加ing，如eat-eating

2. 以不发音的e结尾，去e加ing，如make-making

3. 以"辅元辅"字母结尾，其中元音字母单独发音且处于重音时，双写尾字母加ing，如swim(/swɪm/) - swimming

警告

play( /pleɪ/ ) - playing, ay是一个字母组合，他们组合发音双元音 [eI] ,所以直接+ing open( /ˈəʊpən/ ) - opening,元音e处于弱读非重音，所以直接+ing

4. 以ie结尾，把ie变成y加ing，如lie-lying

I was eating noodles at six o'clock yesterday evening.昨晚六点，我正在吃面条。

At that moment,Mother was flying in the sky.那时，妈妈正在天空中翱翔。

When I came in,you were stealing homework.当我进门的时候，你正在偷作业。

When we were doing homework,the teacher smiled.当我们在做作业的时候，老师笑了。

As/When he was eating noodles,the noodles ran away.当他正在吃面条的时候，面条跑了。

At this time yesterday, my father was watching TV, while I was dancing in front of him.昨天这个时候，我爸爸正在看电视， 而 我在他面前跳舞。

She was sleeping all that morning.那天早晨，她一直在睡觉。

句型转换

• They were swimming in the desert then.那时，他们正在沙漠里游泳。

  • They weren't/were not swimming in the desert then.

  • Were they swimming in the desert then?

    • Yes, they were.

    • No, they weren't.

小技巧

当...时候( when, while, as)

when,as都是可以跟长动作和短动作;而while只可以跟长动作。

短动作用一般过去时，长动作用过去进行时。

When I was singing, someone threw an egg at me.当我唱歌的时候，有人用鸡蛋砸我。

While I was singing, someone threw an egg at me.

As I was singing, someone threw an egg at me.(throw...at... 用...砸...)

When I woke up,it was raining outside.当我醒来的时候，外面正在下雨。

As I woke up,it was raining outside.

X While I woke up,it was raining outside .

While I was doing homework,the teacher was using the mobile phone.当我正在做作业时，老师正在玩手机。

I was driving, while he was painting the windscreen black.我正在开车，而他正在把挡风玻璃涂成黑色。