Tom is not himself today.为什么himself是代词

himself的词性就是代词。 (be) himself，用作表语的意思是：(他的情绪、健康等的)正常情况.

如：He killed himself 他自杀了 

He killed him 他杀了他 

这是两个不同的概念了

himself 

代词（反身代词）他自己 （用以加强语气）他亲自，他本人

例句：

代词

He doesn't seem himself today.他今天看起来有些反常。

He does not like it himself.他自己都不喜欢它。

He became himself again.他又苏醒过来。

He himself has done it lots of times!他自己就已戒过许多次了！

Did he hurt himself when he fell他跌倒时伤着了吗