一道英语动词题~急等~^^

一道英语动词题~急等~^^

题目
一道英语动词题~急等~^^
Tom looked at Jenny,tears filling his eyes,and shouted out the words______in his heart for years.
为什么是hidden
句中有for years ,为什么不用having been hidden呢?
答案
“have been doing” 才是现在完成进行时.如“She has been writing the letter since two hours ago.”两个小时以来,她一直都在写信.而“having been done”是现在分词完成时的被动式,表示该动作发生在主句动作之前已经做完.这里考察非谓语动词的用法,“the words”是被藏的,用过去分词的形式即可,相当于一个被省略的定语从句,补全为“Tom looked at Jenny,tears filling his eyes,and shouted out the words(which were)hidden in his heart for years.”后置定语不可以用“having been done”的形式.谢谢.
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