将来完成时的使用

1.到将来的某时间，某动作已经完成,如：
He will have written 10 books next year.
2.某动作或状态到将来的某时间持续了多久，如：
By the end of this year,he will have taught for 30 years.

将来完成时

1) 构成will / be going to do sth.
2) 概念
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。
They will have been married for 20 years by then.
You will have reached Shanghai by this time tomorrow.

将来完成时的用法

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