2019学年度北师大版Unit20 Period Five Grammar & Writing学案设计
一、将来完成时
1.概述
将来完成时由"shall/will+have+过去分词"构成。
将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作。经常与"before+将来时间"或"by+将来时间"连用,也可与before或by the time引导的现在时的从句连用。
I shall have finished the work by the end of this week.
我将在本周末前完成这项工作。
Before long he will have forgotten all about the matter.
不久他将会完全忘记这件事的。
He is somebody now.He will not have remembered his old classmates.
他现在是一个有身份的人,他可能不会记得老同学了。
Will you have known Kevin for 10 years next month?
到下个月你认识凯文该有10年了吧?
2.用法
(1)表示在将来某一时间之前已完成的动作,并可能对将来产生影响。
We shall have learned 12 units by the end of this term.
到这个学期末,我们将学完12个单元。
By the time you get home,I will have cleaned the house from top to bottom.
你到家之前我将已经把房子彻底打扫一遍了。
(2)表示推测,相当于must have done结构。
You will have heard of this,I guess.
我想你已经听说过这件事了。
I am sure he will have got the information.
我确信他一定得到了这个消息。