(1)将来完成时的构成:will have done,表示到将来某一时刻已经完成的动作,必须和某个时间状语连用,强调到将来某一点时间动作的结束。
Workers will have completed the new roads by the end of this year.
今年年底前工人们就建好这条新路了。
(2)将来进行时的构成:will be doing,表示将来某个时候正在进行的动作或表示计划好的事,陈述将来的事实。
They will be arriving here tomorrow.
他们明天就到了。
(3)将来完成进行时的构成:will have been doing,表示某种状况一直持续到说话人所提及的时间,从某一点发生, 一直延续到将来的某一点, 并且将可能延续下去,强调到将来某一点时间动作可能结束或延续。
By this time next week, I will have been working for this firm for twenty years.
下礼拜的这个时候,我就在这家公司工作满20年了。
By Friday midday, they will have been working on it for seven days.(work on sth. 关于……的工作)
到周五中午为止,他们就为此工作7天了。
(4) 在时间状语从句中,要用现在完成时代替将来完成时:
By the time I’ve completed this one, I’ll have been writing for six years.
到我写完这本书时,我将已经写了6年书了。
When I’ve built this one, I’ll have built five altogether.
我建好这座楼的时候,我将已经建了5座了。
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