12、将来完成时
（1）构成：shall/will + have + 过去分词
（2）用法：将来完成时动词主要表示在将来的某一时刻或将来的某一时刻之前完成的动作，这一动作也可能继续进行。例如：
By seven o’clock this afternoon we shall have got to Shanghai if the train keeps good line. 如果火车运行正常，我们今天下午七点就到上海了。
Before bedtime Xiao Ming will have completed his work. 到上床睡觉的时候，小明会做完他的工作（或作业）。
By February next year this foreign expert will have been here on this job for five years. 到明年二月，这个外国专家在这儿做这项工作就满五年了。
By Sept. 2008 Beijing will have held/hosted the Olympic Games. 到2008年9月，北京将举行完了奥运会。
翻译练习：
1）七月份你们再来时，他们就搬进新房子里去了。
When you come again in July, they will have moved into a new house.
2）到下一个五一节，我们在一起的时间就很长了。
By next May Day we shall have been together for a long time.
3）我相信，在你到那儿之前，这些困难他已经解决了。
I’m sure he will have settled/solved the difficulties before you arrive there.
4）到明年七月，我就大学毕业了。
By July next year, I will have graduated from college.