一般疑问句

Were they playing football at that moment？

Were you watching TV the whole morning？

Were you doing your homework when I was out？

Were you having dinner when they came？

特殊疑问句

What was he saying yesterday？

What were they doing at that moment？

Who was going canoeing at this time of yesterday？

What were you doing in my room the other day？

肯定句

I was finishing my homework at night.

I was communicating with some foreigners when my mother called me.

She was having a bath when I went to his house yesterday morning.

We were having class at this time yesterday.

否定句

She wasn't watching TV at that time.

He wasn’t having supper last night.

I wasn't playing computer games at 8:00 yesterday morning.

We weren't having class at this time yesterday.

这些句子展示了过去进行时在不同句子类型中的用法，包括一般疑问句、特殊疑问句、肯定句和否定句。希望这些例子对你有所帮助。