是反身代词，不是名词，例如：

1. Do it yourself ─ I don't have time.你自己做吧——我没时间。

2.If you don't believe me, go and see for yourself!要是不信我说的，你自己去看看！3.There's bread on the table. Help yourself桌上有面包。你自己拿吧。4.What is yours but is used by others more than by yourself 什么是你们的，但所使用的其他多由您自己？