Definition

Possessive nouns are those nouns that indicate ownership or possession. We usually form possessive nouns by adding an apostrophe + s to the end of the noun. 

For example, the noun "cat" becomes the possessive noun "cat's" when we want to show that the cat owns something.

• For example, "The cat's toys are under the bed." This sentence shows that the toys belong to the cat.
• For example, "Bob's sister is my best friend." This sentence shows that Bob's sister is the speaker's best friend.

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Possessive nouns are a great way to show ownership and possession, but they can also be a bit tricky to use. 

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Tips

1. Make sure the noun you want to make possessive is actually a noun. You can't make a verb or an adjective possessive.

2. When you're making a singular noun possessive, just add an apostrophe + s to the end. For example, "the cat's toy."

3. When you're making a plural noun possessive, you have two options. You can either add an apostrophe + s to the end (e.g. "the cats' toys"), or you can add just an apostrophe (e.g. "the cats' toys"). The second option is generally considered to be more correct.

4. Be careful with possessive pronouns. Possessive pronouns (e.g. "hers," "his," "theirs") don't require an apostrophe + s, even when they're indicating possession.

5. Remember that Possessive Nouns are not the same as Adjectives. Although both words can indicate possession, only Possessive Nouns can be used as Nouns. 

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Conclusion

Possessive nouns can also be used to show how something is related to another person or thing. Possessive nouns are an important part of grammar, and they can be a bit tricky to master. But once you get the hang of them, they're easy to use and can really add meaning to your sentences.

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