49 將來完成時的三種用法　Track 049

同前面其他完成時態(tài)一樣，將來完成時態(tài)也有三種基本用法。
（1）表示延續(xù)到將來某一時刻的動作或狀態(tài)

 
注：虛線表示這一動作可能開始于現(xiàn)在、過去或?qū)?；實箭頭表示這一動作延續(xù)到將來某一時刻；虛箭頭表示這一動作可能繼續(xù)延續(xù)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）表示將來某一時刻之前發(fā)生的動作對將來有影響

 

 

（虛線表示這一動作對將來有影響。）
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
正確答案：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
正確答案：A。

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