将来完成时 ．
将来完成时用来表示在将来某L时商以前已经完成或二直持续的苦作，经常与hefore．+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：
结构 will/ 用法 例句 We shall have learned 12 units by the end of his tern到这个学期期末,我们将学完l2个单元。 You will have heard of this guess我想你已经听说过这件事了 We will have been married a year on June 25tll. 到6月25日我们俩结婚就满1年了 shall+ 表示在将来某一时间之前已完成的动作；have+过去分词 并往往对将来莱一时间产生影响。 2．表示推测，相当于“must have done” 结构。 3．表示某种状态一直持续到说话人所提及的时间。 【真题汇编】 一，～ 1. Hardly ___at the office when telephone rang 【2009 6--22】
A.I arrived B.I had arrived C. did l arrive D had I arrived.
2.If the engineer (come)___ here yesterday，the problem would have been solved.【2010. -6--30. 】
3. We were excited to learn 'that the last month's sales ___ by 30%【2010. 12-23】 A. had increased B. increase C. are increasing D. have increased
4．The ,company has been producing this model of machine too____2008. [2010. 12-17】 A. since B. after C. for D. before
5. We ____budding the bridge by the end_0f next month【2010. 12-23】
A. are finishing B. have finished C. would finish D. will have finished 【答案】
1.D 2.had come 3.A 4.A 5.D
