but 的具体用法是什么?He did nothing but stay idel.He had no choice but to give in.一句有to,一句没有to
问题描述：
but 的具体用法是什么?
He did nothing but stay idel.
He had no choice but to give in.
一句有to,一句没有to
答
我告诉你个口诀：“有do,无to；无do,有to”,在but的前面如果出现了do,did,does的话,but 后面的to就可以省略,另外,此类的用法,还有except 和主系表结构,也是一样的.e.g.They did nothing but wait.She did nothing ex...