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将来完成时
将来完成时是这两年常考的语法点，基本结构是"will/shall + have done"，表示在将来某一时刻之前完成的动作。
例：I'll have finished my work by five this afternoon.
今天下午五点我就完成我的工作了。
The snow will have diappeared before the end of March.
雪在三月底之前就会全部消失。
往年试题：
例 (1)By next year he ______ in New York for five years.
A. has worked B. has been working C. works D. will have worked
答案：D
例(2)I _____ writing the article by the time you get back.
A. shall finish B. must have finished C. have finished D. shall have finished
答案：D
