The personal pronoun 'her' is the singular objective form. The possessive forms are the possessive pronoun hersand the possessive adjective her.
A possessive pronoun takes the place of a noun that belongs to a female. Example:
The house on the corner is hers.
A possessive adjective is placed in front of a noun to describe that noun as belonging to a female. Example:
Her house is on the corner.
The singular possessive form is week's.
The singular possessive form is classmate's.
The possessive form is Amos's.
The singular possessive form for the noun gypsy is gypsy's.
The singular possessive form for country is county's.
The singular form for the plural noun countries is country; the singular possessive form is country's.
singular possessive: boy'splural possessive: boys'
The singular possessive form is speculum's.
The singular possessive form is contralto's.
The singular possessive form is frontiersman's.
The singular possessive form is aircraft's.
The singular possessive form is herd's.