Here's why:
* Prepositions show the relationship between a noun or pronoun and another word in the sentence. They often describe location, time, or direction.
* Pronouns replace nouns (e.g., he, she, it, they).
* Interjections express strong emotions (e.g., Ouch! Wow! Yikes!).
Example:
* "The cat jumped into the box." Here, "into" shows the direction of the cat's jump.