oneself 与 by oneself区别具体点

y oneself :这个往往在句子中作状语,可以将其省略句子还是通顺的.
它强调的是方式,即：一个人、独自地
oneself ：在句子中作同位语、宾语、表语等.只有作同位语时,可以省略
如 the boy came to the shop himself .中的himself是同位语
He isn't quite himself .他今天状态不好.中的himself不可以省略
He enjoyed himself at the party.派对上,他玩得很开心.宾语,不可以省略

oneself 是某人自己
by~是指某人可以自己做
例句 Me,myself,did this work
i did this work by myself