by himself meaning in English
独自一人，独自地
他独自地, 他独立地
Examples
- Wasn't he afraid to go there by himself ?
他不怕独自一人到那里去吗？ - There are nights when he goes off by himself .
晚上他有时会只身外出。 - Why not let giles fetch her by himself ?
干嘛不让基尔斯自己去接她？ - He lives all by himself in that large house .
他独自一人住在那所大房子里。 - Nobody can do this job by himself .
单独一个人干不了这个活。