They failed to pass the exam last time,I regretted___.

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/09/22 19:44:18

They failed to pass the exam last time,I regretted___.
A.being unable to help B.not to be able to help
请解释为什么.
regret to do 和 regret doing 的区别

egret to do sth.很遗憾地／抱歉地做...（事情还没有做）
I regret to tell you that you can't pass the examination.我很遗憾地通知你你不能通过这次考试．
regret doing sth.很遗憾/后悔做了...（为已经做过的事而感到...）
I regret disturbing yo so long.我很抱歉打扰了你那么久
所以此题应该选A
再问：请问在这道题中应该怎样理解呀，我觉得两个都是对的
再答： They failed to pass the exam last time。上次他们考试不及格。很明显，这事是发在过去了。 I regretted being unable to help。没能帮到他们，我觉得很抱歉。过去你该帮，但是却没有。也是过去了。 regret doing sth. 很遗憾/后悔做了...（为已经做过的事而感到...）这个是肯定，本题是否定，一样的。

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