59 將來(lái)完成進(jìn)行時(shí)的用法　Track 059

59 將來(lái)完成進(jìn)行時(shí)的用法　Track 059
將來(lái)完成進(jìn)行時(shí)的用法與現(xiàn)在完成進(jìn)行時(shí)的用法基本相同，只是將“坐標(biāo)時(shí)間”移到將來(lái)。同樣是強(qiáng)調(diào)動(dòng)作的持續(xù)性，表示開始于將來(lái)某個(gè)時(shí)刻之前的動(dòng)作持續(xù)到將來(lái)這一時(shí)刻，并可能繼續(xù)持續(xù)下去。
（1）強(qiáng)調(diào)在將來(lái)的某一時(shí)刻之前一直在持續(xù)的一項(xiàng)活動(dòng)

 
例句
a. My brother has promised to help me study for my exam tomorrow.I get home from school at 3:00 and he gets home from school at 5:00. I will have been studying for two hours by the time he gets home.
（到5:00，studying的活動(dòng)仍將持續(xù)）
b. I’m retiring this fall. By then I’ll have been teaching for 30 years.
（到今年秋天，teaching的活動(dòng)不再持續(xù)）
c. She will have been taking care of her blind husband for 20 years by then.
（taking care of的活動(dòng)可能還會(huì)持續(xù)）
d. I’m getting tired of sitting in the car. Do you realize that by the time we arrive in Beijing, we will have been driving for twenty straight hours?
（2）表示在將來(lái)某個(gè)時(shí)刻之前經(jīng)常重復(fù)的動(dòng)作
例句
a. I will have been attending Professor Smith’s lectures for half a year by next week.
b. By tomorrow I will have been doing morning exercises for 100 days.
c. The old man will have been getting up at 4:00 for ten years by next month.
到下個(gè)月，這位老人堅(jiān)持早晨4:00起床的習(xí)慣就保持10年時(shí)間了。