过去将来完成时指，在过去的时间来看，将来的某段时间会已经完成的动作或是状态。其基本结构是“would+have+动词的过去分词”，经常和by now、by then等搭配。
过去将来完成时的结构：would have+过去分词
1.The day was drawing near when we would have completed the reservoir.
我们建成水库的日子不远了。
2.He said he would have done with my camera by the end of next month.
他说到下月底就不用我的照相机了。
3.I guessed that Mother would have made some sandwiches by the time we got back.
我猜我们回来时妈妈已经做好一些三明治了。
4.I thought he would have told you something important.
我想他会已告诉你重要的事情。
5.He knew by the time she would have left him forever.
他知道到那时她会永远的离开他。
6.The day was not so far when we would have finished this project.
我们完成这个项目的日子不远了。
