过去将来完成进行时

过去将来完成进行时的用法与将来完成进行时是一致的，但其立足的时间点是在过去。
* He said that by the end of the spring term he would have been studying English for three years.
他说到春季（即下）学期末，他将学了三年英语了。
* He told me that by the end of the year he would have been living there for thirty years.
他告诉我，到年底他在那里住了有30年了。
* Mr. Jackson decided to return to London next month. By that time he would have been working with us here for six years. 杰克逊先生决定下个月回伦敦。到那时他在这里就已和我们一起工作六年了。