A Possessive pronoun shows ownership or relationship. Some possessive pronouns come before nouns. The possessive pronouns in the box below must be used before a noun.
This is Jill's book.
This is her book
The Smiths' dog is very playful.
Their dog is very playful.
Some possessive pronouns are used in place of possessive nouns.
Example 2: This book is Jill's.
This book is hers.
The playful dog is the Smiths'.
The playful dog is theirs.