1.未来完成式表示在未来某时刻或某个动作之前已完成的动作。
2.未来完成式的形式是shall(will)+have+过去分词。
3.未来完成式表示在未来某时刻前已完成的动作,常与by,before引导的表示的未来的时间副词片语连用。
By the time you get back I shall have finished it.
到你回来时我已经把活做完了。
By the end of this month you will have broken all our dishes.
到这月底,你会把我们的餐具全都打破了。
I shall have graduated by 2000.
到2000年我将已经毕业了。
4.未来完成式表示将来的经历或对其后的影响。
If you break one more plate, you will have broken twenty dishes.
如果你再打碎一个盘子,你就已经打二十个餐具了。
I shall have watched the movie twice if I go to the cinema again.
如果我再去一次电影院,我就看本片两次了。
5.在时间和副词子句中,用现在完成式代替未来完成式>来表示将来某一时刻以前已完成的动作。
You're not to stop until all of them have been broken.
不到所有餐具都已经碎了时你是不会停下来的。
Unless all these old dishes have been broken, I shall not buy those new ones.
除非这些旧盘子都碎了,我是不会买新餐具的。
Tell me what you think about the film when you have seen it.
你看完这部电影之后告诉我你对它的意见。