swaggering

He has a swaggering.→He has a swaggering walk.

swaggering 是形容词，不能直接用作名词，必须修饰一个名词。

He walked swaggering down the street.→He walked swaggeringly down the street.

swaggering 是形容词，不能修饰动词。需改为副词 swaggeringly 或使用介词短语如 with a swaggering gait。