Hard working 用于什么后面?它与work hard,hard work ,working hard的区别?

work hard
1.单独作为一句话 Work hard! 翻译为：要努力哦.
2.动词原形 You need to work hard to get what you want. 你需要努力从而去得到你想要的.
hard work
名词 Getting what you want needs hard work. 要得到你想要的是需要努力的.
working hard
1. 动名词 相当于名词 Working hard is important. 努力是很重要的.
2.现在分词 She is working hard. 她真的很努力.