过去进行时.ppt

第六讲过去进行时
The past continuous tense
过去时+ 进行时
基本情况
时间状语:
Ago(two hours ago(一段时间+ago),
yesterday the day before yesterday, last week / year / night / month(句子开头或结尾),
具体时间()
just now, at the age of , one day,once upon a time ,long long ago等
when/while 引导的从句
动词形式
现在分词–ing
肯定句:was/were +doing
否定句:was/were +not+ doing
一般疑问句:was/were 提前
Yes ,主语+was/were.
No ,主语+wasn’t/weren’t.
用法
一、过去某个时间点正在发生的事情
时间点可以用介词短语、副词或从句来表示
如:
What was she doing at nine o'clock yesterday?  昨天晚上九点她在做什么? (介词短语表示时间点)
 When I saw him he was decorating his room.  当我看见他的时候他正在装饰房间。(when从句表示时间点)
二、过去一段时间内一直在进行的动作
常用的时间状语:this morning, the whole morning, all day yesterday, from nine to ten last evening
如:
We were watching TV from seven to nine last night.  昨天晚上七点到九点的时候我们在看电视。       
What was he researching all day last Sunday?  上周日他一整天都在研究什么?
三、过去进行时描述一件事发生的背景;一个长动作发生的时候,另一个短动作发生。
常用于when, while引导的从句

如:
My brother fell while he was riding his bicycle and hurt himself.  我哥哥骑自行车的时候从车上摔下来,受伤了。 It was raining when they left the station.  他们离开车站的时候天正在下雨。 When I got to the top of the mountain, the sun was shining.  当我到达山顶的时候,阳光灿烂。
While +过去进行时,主句一般过去时
When+一般过去时,主句过去进行时
My brother fell while he was riding his bicycle and hurt himself.
When my brother fell, he was riding his bicycle.
It was raining when they left the station.
They left the station while it was raining.
四、在复合句中,如果主要动作和背景动作都是延续的或同时发生的,那么主从句的动词都可用过去进行时。
例如: While he was waiting for the bus, he was reading a newspaper. 他边等车边看报。(两个动作都是延续的) He was cleaning his car while I was cooking.  他擦车时我在做饭。(两个动作同时进行)
五、用过去进行时代替过去将来时

1)表示渐变的动词有:get, grow, e, turn, run, go, begin,die等
如:
The leaves were turning red. It was getting warmer and warmer. He was dying .