Here's why:
* Conjunctions connect words, phrases, or clauses. They show relationships between the connected elements.
* Prepositions show the relationship between a noun or pronoun and another word in the sentence. They usually indicate location, time, or direction.
Example:
* Conjunction: "I wanted to go to the party, but I was too tired." ("But" connects the two clauses.)
* Preposition: "The book is on the table." ("On" shows the relationship between "book" and "table".)
Let me know if you'd like more examples!