过去将来完成进行时（Past Future Perfect Continuous Tense）是一种较为复杂的时态，用于描述在过去某一时间点之前已经开始并且预计会持续到过去将来的某个时间点的动作。这个时态通常由“would have been + 现在分词”构成。以下是一些例句：
I heard by July you’d have been teaching here for ten years.
我听说到七月份，你就在这里教了10年书了。
He said that by the end of the spring term he would have been studying English for three years.
他说到了春季学期末，他就学了三年英语了。
I knew by that time he would have been working there for 30 years.
我知道到那时他他就在那儿工作满30年了。
She told me she’d have been teaching in that university for 20 years by that summer.
她告诉我到那年夏天她在那所大学教书就满20年了。
By 10 o'clock last night, I will have been studying for 3 hours.
到昨晚10点钟，我已经学习了3个小时了。
By the end of this week, we will have been living in this city for 10 years.
到下个月，我们将会在这个城市生活已经十年了。
By 5 o'clock tomorrow, I will have been studying for 4 hours.
明天五点之前，我将会已经学习了四个小时了。
Latterly, they would have been reading Virgin books, watching Virgin videos and Virgin films.
最近，他们一直在阅读维珍图书、观看维珍视频和维珍电影。
New York was swathed in sunlight and the heat would have been stifling had it not been for a gentle easterly breeze blowing in from the Atlantic.
纽约沐浴在阳光下，如果不是来自大西洋的轻柔东风，热量本会令人窒息。
Maybe we, it may well be that you were with other people, I wonder what sort of things if you were in a condition of speaking, what sort of things you would have been saying to them.
也许我们，可能你和其他人在一起，我想知道如果你在说话的状态下，你会对他们说些什么。
Obviously no expense was being spared to make the night a success, and in different circumstances she would have been looking forward to it, but now, as silence settled over the car, she could feel herself growing tense.
显然，为了使夜晚成功，毫不节省地花费了每一分钱，但在不同的情况下，她本来会期待它，但现在，随着沉默笼罩了汽车，她能感觉到自己变得越来越紧张。
这些例句展示了过去将来完成进行时在不同语境下的应用，包括间接引语、条件句和独立句等。希望这些例句能帮助你更好地理解和掌握这一时态。
