同前面其他完成时态一样，将来完成时态也有三种基本用法。
（1）表示延续到将来某一时刻的动作或状态

 
注：虚线表示这一动作可能开始于现在、过去或将来；实箭头表示这一动作延续到将来某一时刻；虚箭头表示这一动作可能继续延续下去。
例句
a. I will have taught English in New Oriental School for five years by the end of next month.
b. I will have learned 8,000 words by the end of next year.
c. I will have waited for her for two hours when she arrives at 14 o’clock.
d. The old man will have worked in this factory for 50 years when he retires next month.
（2）表示将来某一时刻之前发生的动作对将来有影响

 

 

（虚线表示这一动作对将来有影响。）
例句
a. We will have finished our exams by the end of next week. b. By the year 2050, scientists probably will have discovered a cure for cancer.
c. By the time I see you, I will have graduated.
d. I will have finished my homework by the time I go out on a date tonight.
e. The construction company will have completed the stadium by the end of next July, when the Olympic Games is to be held here.
f.—May I speak to your manager, Mr. Williams, at eight tonight?
— I am sorry. Mr. Williams______to a conference long before then.
A.will have gone
B.had gone
C.would have gone
D.has gone
正确答案：A。
g. I hope you______all the material before you make the final decision.
A.will have read
B.will be read
C.will be reading
D.would have read
正确答案：A。

 
例句
By five o’clock this afternoon the spaceship will have travelled eleven times round the Earth.