Here's why:
* Adverbs modify verbs, adjectives, and other adverbs. They describe how, when, where, or to what extent something happens.
* Nouns and pronouns are the subjects or objects of a sentence. They are the people, places, or things that are being discussed.
Example:
* Incorrect: The *quickly* dog ran.
* Correct: The dog ran *quickly*.
In the correct sentence, "quickly" modifies the verb "ran," describing how the dog ran.
To modify a noun or pronoun, you would use an adjective:
* Correct: The *fast* dog ran.
Here, "fast" is an adjective describing the dog.