將來完成的用法

將來完成時的用法如下：

1. 表示“將來完成”

即表示到將來某個時間爲止勢必會完成或預計要完成的動作。如：

When we get there, she'll have gone to work. 我們到那裡時她會已上班去了。

I expect you will have changed your mind by tomorrow. 我預料到明天你就會改變主意了。

2. 表示“持續”

即表示某種狀況將一直持續到說話人所提及的某一將來時間。如：

We will have been married a year on June 25th. 到6月25日我們倆結婚就滿1年了。

By this time next week, I will have been working for this company for 24 years. 到下星期此刻，我就已經爲該公司乾了24年了。

3. 表示“推測

即表示根據某情況作出的推測。如：

That will have been Roland. He said he'd be back at 7. 準是羅蘭。他說他7點鍾廻來。

There will have been a definite result before Friday. 星期五以前肯定會有結果。