将来完成进行时

将来完成进行时用来表示一个动作到将来某个时间点的持续时间。这种时态在英语中不常用。

这种时态常与下列时间短语连用:

... by / ... by the time ...

基本结构

肯定的

Subject + will + have + been + verb + ing + object(s) + time Expression

主语+ will + have + been +动词+ ing +宾语(s) +时间表达

We will have been studying for two hours by the time he arrives.

否定的

Subject + will not (won't) + have + been + verb + ing + object(s) + time Expression

主语+ will not (won't) + have + been +动词+ ing +宾语(s) + time Expression

He won't have been working long by two o'clock.

问答

(Question Word) + will + subject + have + been + verb + ing + object(s) + time Expression

(疑问词)+ will +主语+ have + been +动词+ ing +宾语(s) +时间表达

How long will you have been working on that project by the time he arrives?