1、将来完成时用will/shall+have+过去分词用于第一人称，will+have+过去分词用于其他人称，而将来完成进行时用will/shall+have+been+现在分词用于第一人称，will+have+been+现在分词用于其他人称
2、将来完成时表示在将来某一时间之前已经完成的动作，并往往对将来某一时间产生影响，如we shall have learned 12 units by the end of this term
3、将来完成进行时也可表示推测,相当于must have done结构，如you will have heard of this, i guess，我想你已经听说这件事了
4、将来完成时还可表示某种状态一直持续到说话人所提及的时间，如we will have been married a year on June 25th
5、将来完成进行时动作本身就是连续的，如by the end of the month, he will have been living/working/studying here for ten years
6、将来完成时是一种经常进行的动作被表示为连续的动作，如by the end of this month, he will have been training horses/climbing mountains for twenty years
