first,at first,first of all,firstly之间的区别

题目

first,at first,first of all,firstly之间的区别

答案

first形容词,细分为序数词,属于特指范围限定作用词.常与基数词连用.也可以当副词用.
at first,一开始,起先
first of all首先,重要的是
firstly只能做副词用,首先,第一.