Ask a English questionThe old man,____abroad for twenty years,is on the way back to his montherland.为什么不填to have worked而填having worked?
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![Ask a English questionThe old man,____abroad for twenty years,is on the way back to his montherland.为什么不填to have worked而填having worked?](/uploads/image/z/10657901-29-1.jpg?t=Ask++a++English++questionThe+old+man%2C____abroad+for+twenty+years%2Cis+on+the+way+back+to+his+montherland.%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E5%A1%ABto+have+worked%E8%80%8C%E5%A1%ABhaving+worked%3F)
Ask a English questionThe old man,____abroad for twenty years,is on the way back to his montherland.为什么不填to have worked而填having worked?
Ask a English question
The old man,____abroad for twenty years,is on the way back to his montherland.
为什么不填to have worked而填having worked?
Ask a English questionThe old man,____abroad for twenty years,is on the way back to his montherland.为什么不填to have worked而填having worked?
楼上的回答得不对.
"to do sth."是不定式,多用来表示计划做某事和动作的趋向、目的、指示;动词的"-ing"形式可以表示伴随的状态和正在进行的动作.
由于是对“have worked”进行修饰,“老人工作了二十年之后回到祖国”,这里强调的是伴随的已经完结的状态,而不是指向性的未进行的动作.因此用动词的“-ing”形式而不是不定式.