1. John fixed the tape recorder by himself.
   約翰靠他自己修理錄音機。
2. He flung himself into his work with renewed vigor.
   他又精神抖擻地投入自己的工作。
3. His new house was built by himself, brick by brick.
   他的新房子是他自己一塊磚一塊磚砌起來的。
4. He's making himself cheap by his unpleasant behaviour.
   他那令人討厭的行為有損他自己的身份。
5. He made a barrel with staves by himself.
   他自己用桶板做了一只桶。
6. He lives all by himself in that large house.
   他獨自一人住在那所大房子里。
7. He said it himself.
   他親口說的。

him.self

pron.（代詞）
That one identical with him:
他自己：同一個人（他him)
Used reflexively as the direct or indirect object of a verb or the object of a preposition:
他自己：人為反身代詞，用作動詞的直接賓語或間接賓語或介詞賓語：
例句：
He congratulated himself.
他向自己祝賀

Used for emphasis:
他本人：作為強調，加強語氣：
例句：
He himself found the courage.
他自己找到了勇氣

Used in an absolute construction:
用于獨立結構中：
例句：
In the black himself, he could offer financial assistance to his cousin.
暗地里，他能給他的表親提供經濟援助

His normal or healthy condition or state:
他的正?；蚪】禒顟B(tài)：
例句：
He`s feeling himself again.See Usage Note at myself
他恢復了健康參見 myself

來源：
Middle English
中古英語
from Old English himselfum
源自 古英語 himselfum
him [him] * see him
him [他（賓格）] *參見 him
selfum [dative of] self [self] * see self
selfum [] self的與格 [自己] *參見 self