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