在英语语法中，时态是用来表示动作发生时间的语法形式。“过去进行时”是一种用来描述在过去某一特定时间点或时间段内正在发生的动作或状态的时态，这种时态由助动词“was”或“were”加上动词的现在分词构成，并且通常与一个表示过去的时间状语连用，如“at that time”、“when I called you”等，我们就来分享一些关于过去进行时的句子，并探讨其用法和特点。

基础结构

1. 肯定句：主语 + was/were + 现在分词（-ing） 例句：She was reading a book when her mother came in. They were having dinner at 8 o'clock last night.

2. 否定句：主语 + was/were not + 现在分词（-ing） 例句：He wasn't watching TV at that time. We weren't going to the party yesterday evening.

3. 疑问句：Was/Were + 主语 + 现在分词（-ing）+ 其他成分？ 例句：What were you doing at 9 o'clock last night? Were they playing football when you arrived?

使用场景

1. 描述过去某个时刻正在进行的活动： 例句：At that moment, the children were playing outside. When I called you, she was cooking dinner.

2. 强调过去某个时间段内的持续性动作： 例句：During the summer, we were travelling around Europe. For weeks, he was working on his project.

注意事项

1. 过去进行时通常用于描述过去某个具体时间点或一段时间内的动作,而不是整个过去的活动，不能说“I was studying last week”，而应该说“I studied last week”。

   

2. 过去进行时常与过去完成时连用,以表达两个过去事件之间的先后关系。“By the time he arrived, the meeting had already started.”

3. 在某些情况下,过去进行时可以用来表示委婉的语气或礼貌的请求。“Excuse me, were you saying something?”

练习题

1. 填空题：

   • At midnight, the whole city __ (sleep) except for a few people who were still awake.
   • While I __ (wait) for the bus, I saw my friend walking towards me.
   • They __ (have) a party last Saturday night.

2. 选择题：

   • What __ she __ (do) when you called her? A. is, doing B. was, doing C. does, do D. did, do

3. 改错题：

   • He didn't go to bed until midnight. (改为过去进行时)
   • We went to the cinema last Friday. (改为过去进行时)
   • She is always helping others. (改为过去进行时)

过去进行时是英语中常用的时态之一,它能够帮助我们更准确地描述过去某个特定时间点或时间段内的动作或状态，通过掌握其基本结构和使用场景，我们可以更加灵活地运用这一时态，使英语表达更加丰富多样，希望今天的分享能够帮助大家更好地理解和使用过去进行时，提升英语水平。