英语单选,分词类

问题描述:

英语单选,分词类
Not realizing/realized that he made a mistake,Jeff went on with his speech.选哪个?ed还是ing?我觉得水ed好像错了

realizing
过去分词不做主语这个不是做主语的问题吧,为什么不用realized?不好意思我错了。是现在分词作伴随状语不能用ed表示已经发生的事吗?我这里脑子好混乱Jeff went on with his speech, not realizing that he made a mistake.