Tom is not himself today.為什麼himself是代詞

himself的詞性就是代詞。 (be) himself，用作表語的意思是：(他的情緒、健康等的)正常情況.

如：He killed himself 他自殺了 

He killed him 他殺了他 

這是兩個不同的概念了

himself 

代詞（反身代詞）他自己 （用以加強語氣）他親自，他本人

例句：

代詞

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

He does not like it himself.他自己都不喜歡它。

He became himself again.他又甦醒過來。

He himself has done it lots of times!他自己就已戒過許多次了！

Did he hurt himself when he fell他跌倒時傷着了嗎