Possesive adjective - possesive pronouns

Possesive adjective are used to show ownership

Mi libro

My book

Tu pluma

Your pen

The difference between an adjetive and a pronoun.

ADJETIVE --------describes a noun

PRONOUN-------takes the place of a noun

My book is large. (adjective, describes book)

Yours is small.  (pronoun, takes the place of noun)

Your car is green.  (adjective, describes car)

Mine is red. (pronoun, takes the place of noun)

Maria busca a su hermana.

Maria is looking  for her sister.

Juan busca a su hermana.

Juan is looking for his sister.

Ellos buscan a su hermana.

They  are looking for their sister.

Su Madre busca a su hermana.

Your mother is looking for your sister.