Here's how they work:
* Adding 's: For singular nouns, we add an apostrophe and an 's' to show possession. For example:
* The dog's bone (The bone belongs to the dog.)
* The girl's book (The book belongs to the girl.)
* Adding an apostrophe: For plural nouns that end in 's', we only add an apostrophe. For example:
* The birds' nest (The nest belongs to the birds.)
* The teachers' lounge (The lounge belongs to the teachers.)
* Adding 's' to plural nouns not ending in 's': For plural nouns that don't end in 's', we add an apostrophe and an 's'. For example:
* The children's toys (The toys belong to the children.)
* The men's hats (The hats belong to the men.)
Examples of Possessive Nouns:
* The cat's tail
* My brother's car
* The company's profits
* The students' grades
* The United States' history
Key Points to Remember:
* Possessive nouns are often used with other nouns to form noun phrases.
* They indicate ownership or belonging.
* The apostrophe is used to form the possessive form of a noun.
Note: There are some exceptions to the rules, especially with proper nouns and irregular plural nouns.