将来完成时
用法
动词型 will/shall have +过去分词
系表型 will/shall have been + 表语
将来完成时指预见或计划将来某时刻之前已完成的动作,或已存在的状态.
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.
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
的动作或一获得的经验.
You will have reached Shanghai by this time tomorrow.
明天早上这个时候你就到上海了.
You will have finished this grammar book by the end of this semester.
到本学期末你们就已学完这本语法了．
C 在以if,unless,when,before,after,as soon as等连
词引起的状语从句中,通常都以现在完成时代替这个时态：
I intend to go to college after I have completed my highschool course．
You will like the book after you have read it．
