ese

In a sentence

• Ese libro en la mesa es mío.

  That book on the table is mine.

  In this sentence, 'ese' is a demonstrative adjective used to indicate a specific noun that is at relatively close distance to the speaker or mentioned in context, which is 'libro' (book).

• Ese es el mejor ejemplo que he visto.

  That is the best example I have seen.

  Here, 'ese' functions as a demonstrative pronoun that replaces a noun while still indicating specificity, in this case, referring to 'ejemplo' (example).

• Nunca me imaginé que volvieras con ese.

  I never imagined you would return with that one.

  In this usage, 'ese' acts as a pronoun in a colloquial and contextually vague sense, referring to an undefined subject, often a person, and its interpretation depends on the situation.