Answer:In most cases, a possessive noun is formed by adding an apostrophes to the noun, or if the noun is plural and already ends in s, only an apostrophe needs to be added. In the following sentence, boy's is a possessive noun modifying pencil: The boy's pencil snapped in half.
Explanation:Possessive Pronouns: Used in Sentences
The kids are yours and mine.
The house is theirs and its paint is flaking