初中英语语法:“过去进行时”

标志:was / were + 动词的现在分词

1.  表示过去某一时刻或一段时间正在进行的动作,过去进行时中常用的时间状语有the whole morning, all day yesterday, from January to March last year等。如:

I was having a talk with Lucy at that time.

They were watching TV at home last night.

2.  表示过去反复出现或习惯性的动作,往往包含说话者赞扬、责备、厌恶等情绪,通常与always, constantly, continually, forever等频度副词连用。如:

My brother was always losing his keys.

3.  表示按计划、安排过去某时刻将要发生的动作,仅适用于部分趋向动词(如go, come, leave, start, arrive等)。如:

He said they were leaving for Beijing this afternoon.

4.  过去进行时有一个主要用法就是描述一件事情发生的背景(一个长动作延续的时候,另一个短动作发生):

Granny fell asleep when she was reading.

It was raining when they left the station.

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