hard work与work hard的区别

hard work---繁重的工作
eg:It was hard work getting the children off to bed.
哄孩子们去睡可不是容易的事。

work hard---努力工作
eg:He had to work hard for the maintenance of his family.
他为了养家不得不去拼命工作。

hard work困难的工作。定语+名词
work hard努力地工作。谓语+状语