过去进行式和现在进行式有点类似，只是verb to be要用过去式的。可是有一点不同，过去进行式，很少单独用的，而常和另一句子一齐用。举例来说以下的中文句子：
You were playing basketball when I went to see you yesterday.
I was taking a bath when you called.
I was watching TV when you came to see me.
They were dancing when the teacher came in.
They were singing in the station when the train arrived.
Mr. Brown was cleaning his house when his son came home.