Here's why:
* Adjectives describe nouns. They tell us more about a person, place, or thing.
* Common nouns are general names for people, places, or things (e.g., dog, city, book).
* Proper nouns are specific names for people, places, or things (e.g., Fido, Paris, Harry Potter).
Example:
* "The tiny dog barked loudly."
In this sentence, "tiny" describes the dog (a common noun).