将来完成时.doc

定义
将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作。经常与before+将来时间或by+将来时间连用，也可与before或by the time引导的现在时的从句连用。
构成
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。
实例
　　a. 状态完成：表示某事继续到将来某一时为止一直有的状态。并在将来完成。
b. 动作完成：表示将来某一时或另一个将来的动作之前，已经完成的动作或已获得的
用法
　　①表示在将来某一时间之前已完成的动作，并往往对将来某一时间产生影响。
　　We shall have learned 12 units by the end of this term.
　　到这个学期末，我们将学完12个单元。
　　By the time you get home I will have cleaned the house from top to bottom.
　　你到家之前我将把房子彻底打扫一遍。
　　②表示推测，相当于"must have done"结构。
　　You will have heard of this, I guess.
　　我想你已经听说过这件事了。
　　I am sure he will have got the information.
　　我相信他一定得到了这个信息
　　③.表示某种状态一直持续到说话人所提及的时间
　　we will have been married a year on june 25th
到6月25日我们俩结婚就满1年了
练习题（一）
1. By the end of this year, I ____enough money for a holiday.
  A will save  B will be saving  C will have saved  D have saved
2. I have been studying here for four years, by next summer ____-.
 A shall graduate  B shall be graduated  C shall be graduating  D shall have graduated
3. I hope her health _______greatly by the time we come back next year.
A improves  B improved   C will be improved  D will have improve
4. “Are yougoing to Richard”s birthday party?‘
 “ then I ______my homework..”  
A had finished   B will have finished  C would have finished   D finished
5. I suppose by the time I come back in ten years’ time all these old house______down.
A will hav