他孤身一人。

He was alone.

He was alone at the time.

Source: Tatoeba

Sentence Composition

1 他 tā
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)
2 孤身 gūshēn
  1. alone
  2. lonely
3 一人 yīrén
  1. (historical) emperor
  2. a person; one person; someone
  3. by one person; alone
  4. emperor
  5. one person each