过去完成时被动语态的句子结构为“主语 + had been + 过去分词”。以下是一些例句：
在截止日期之前，这个项目已经完成了。
The project had been completed before the deadline.
这座桥已经被修建好了。
The bridge had been built.
许多汽车被这个工厂制造。
Many cars had been produced by this factory.
他被多次告诉不要迟到。
He had been told many times not to be late.
一个房子被建起在我校附近。
A house had been built near our school.
任务在昨天12点之前已经完成。
The task had been finished before 12:00 yesterday.
任务在昨天12点之前还没有完成。
The task hadn't been finished before 12:00 yesterday.
昨天12点之前是否已经完成这个任务？
Had the task been finished before 12:00 yesterday？
这些例句展示了过去完成时被动语态在不同情境下的应用，强调了在过去某一时间或动作之前已经完成的被动动作。希望这些例子能帮助你更好地理解和运用这一语法结构。
