ALCC

例句：

1. 1. I need to be alone for a while.
   我需要独自待一会儿。
2. 2. She is always by herself, never with anyone else.
   她总是独自一人，从不与其他人在一起。
3. 3. He was alone in the room when the fire broke out.
   火灾发生时，他独自一人在房间里。