Here's why:
* Prepositions show the relationship between a noun or pronoun and another word in the sentence. They often indicate location, time, or direction.
* "Through" indicates movement or passage from one point to another.
Examples:
* The ball went through the window. (Location)
* We walked through the forest. (Direction)
* I worked through the night. (Time)
Verb or noun conjunctions are different:
* Verbs are action words.
* Nouns are naming words.
* Conjunctions connect words, phrases, or clauses.
Let me know if you have any other grammar questions!