过去进行时的被动语态结构：
was [were] being+过去分词
过去进行时被动语态例句：
- He said that the man was being operated on.
- 他说那个人正在动手术.
- He told me that a new station was being built.
- 他说正在修建一个新车站.
- Peter's mother was telling him a story.
- 彼得的母亲在给他讲故事。
- A story was being told by Peter's mother to Peter.
- 彼得的母亲正在给彼得讲一个故事。
- Peter was being told a story by his mother.
- 彼得的母亲给他讲了一个故事。