She lost a lot of money.I didn't know how she did so.为什么去掉so?
问题描述：
She lost a lot of money.I didn't know how she did so.为什么去掉so?
答
最根本的,有了助动词,就没有so.有了so,就没有助动词1 前面有了上文（She lost a lot of money）,後面的下文(did== She lost a lot of money）存在了,就可以省略（尽管可以不省略）.如果省略了,句子就显得精炼到位.2 ...