过去将来完成进行时通常用来描述一个动作从过去某一时间开始，一直持续到过去将来的某个时间点。这个时态的被动语态构成是“would have been + 过去分词”。以下是一些例句：
到七月份，你就在这里教了10年书了。
I heard by July you'd have been teaching here for ten years.
他告诉我到七月份他在这儿任教将满十年了。
He told me that he would have been teaching here for ten years by July.
到明年，我将已经学习英语十年了。
By next year, I will have been studying English for ten years.
这些例句展示了如何构造过去将来完成进行时的被动语态，并且它们在语境中也是合理的。希望这些信息对你有所帮助。
