[高中]全新語法:動詞時態(tài)的用法 八、將來完成時

八、將來完成時

1.基本用法

（1）表示未來某時之前或未來某動作前已經完成之動作。

By the end of this week，I shall have finished the book.到本周末，我將讀完這本書。

By this time tomorrow they will have repaired the machine.

明天這時候，他們將修好機器。

（2）表示對現(xiàn)在或將來可能已經完成動作的推測，相當于“must have done”結構。

You will have heard of this，I guess.我想你已經聽說過這件事了。

I am sure he will have got the information.我相信他一定得到了這個信息。

（3）表示持續(xù)到將來某時已經一段時間的動作。

They will have been married for thirty years by 2009.到2009年他們結婚將滿30年了。

We shall have lived here for five years by next March.

到明年3月我們將在此住了5年。

2.將來完成時的常用句式

（1）By the time+主語+一般現(xiàn)在時，主句+will/shall have done ...

The children will have gone to sleep by the time we get home.

等我們回家時，孩子們將已睡了。

【比較】

①By the time he returns we will have prepared the meal.（主句用將來完成時）

②By the time he returned we had prepared the meal.（主句用過去完成時）

（2）By the end of next ...，主句+will/shall have done ...

By the end of next year，they will have completed the work on the new stadium.

到明年年底前他們將已經完成新體育館的建設。

By the end of next month，they will have built the bridge.

到下月底前他們將已經完成大橋的建設。

【比較】

①By the end of next term we will have read 300 books.（主句用將來完成時）

②By the end of last term we had read over 300 books.（主句用過去完成時）