What is the correct way to use an apostrophe in possessive pronouns?

What is the correct way to use an apostrophe in possessive pronouns?

The correct way to use an apostrophe in possessive pronouns is to not use an apostrophe at all. Possessive pronouns, such as "yours," "hers," "theirs," "ours," and "its," already indicate possession and do not require an apostrophe. Using an apostrophe in these pronouns, such as "your's" or "her's," is incorrect.