将来完成时

将来完成时表示在将来某一时间之前完成的动作，并往往对将来某一时间产生影响。它常与表将来时间状语连用。和将来一般时一样，第一人称的shall也常被will所代替。如：
I shall have finished reading the book by the end of this week. 我将在本周未前读完这本书。
Before long, he will have forgotten all about the matter. 过不久，他很快就会把这件事全然忘记的。
有时可与ever，never，soon等时间状语连用，如：
Will you soon have finished laying the table? 你会快点把餐具摆好吗？
Will they ever have done with their talking? 他们谈话还有完没有？
将来完成时往往可和时间或条件状语从句连用，如：
When I have done that, I shall have done all I was supposed to do. 我做完这件事，就做了我全部应做的事了。
If you come at seven o’clock, I shall not yet have finished dinner. 你如七点钟来，我还没有吃完晚饭哩。
[注]在下面的句子中，will是情态动词，有“大概”或“料想是”等含义，并无“将要”的意思：
①You will have heard the news, so I need not repeat it. 你们一定已经听到消息了，所以我就没有必要重复了。

②They will have received our letter now. 他们这时一定收到我们的信了。