In English there are two sets of possessive
words derived from pronoun
s. There are those that are used independently: mine, yours, hers, his, its, ours, theirs
Mine is bigger than yours.
Can I have hers? I broke mine.
These are true pronoun
s. They function as a noun phrase
(NP). The other set are those that are followed by the noun
possessed: my, your, her, his, its, our, their
My hovel is smaller than your mansion.
Though these are traditionally grouped with the first set as 'possessive pronouns', they are in fact more accurately determiner
s (like a, the, this, some, every
, or in a looser terminology adjectives, and linguists often call them the possessive adjective
s, not possessive pronouns. They are the possessive forms of
the pronouns I, you, she
etc. but do not themselves function as pronouns.
The same distinction exists in other languages: French adjectives/determiners mon, ma, mes vs pronouns mien, mienne. In some language they are definitely adjectives because they go with determiners: Italian la mia casa.