Prepositions are words that show the relationship between a noun or pronoun and another word in the sentence. They often indicate location, direction, time, or manner.
Here are some examples of how "through" is used as a preposition:
* I walked through the park. (Indicates location)
* She drove through the tunnel. (Indicates direction)
* He worked through the night. (Indicates time)
* They communicated through email. (Indicates manner)