问题补充:
The old man, abroad for twenty years, is on the way back to his motherland.
A. to work
B. working
C. to have worked
D. having worked
答案:
A. to work
B. working
C. to have worked
(答案→)D. having worked
解析:句意为:那个老人,在海外已经工作了了,现在正在返回祖国额路上。动词的非谓语形式也有时态和语态的变化。结合句意可知,空白处句法上相当于结果状语的功能,应用非谓语形式的完成时,主语和谓语为主动关系,结合句意:D为最佳选项
考点:考察动词的非谓语形式的用法