Here's why:
* Adverbs modify verbs, adjectives, or other adverbs. They often answer questions like "how?", "when?", "where?", or "to what extent?".
* Prepositions show the relationship between a noun or pronoun and other words in the sentence. They often indicate location, time, or direction.
* Interjections express strong emotions or sudden feelings.
Example:
* "However, I still think it's a good idea." In this sentence, "however" modifies the entire following clause, indicating a contrast or exception to the previous statement.
Let me know if you'd like more examples or explanations!