A preposition is a small but powerful word that shows the relationship between things, especially where or when something is. Words like in, on, under, before, after, with, and between are all prepositions.

Think of prepositions as the words that answer questions like “Where?” or “When?” If your backpack is on the table, under the chair, or beside the door, each of those italicized words is a preposition showing where the backpack is in relation to something else. If your soccer practice is after school, before dinner, or during the weekend, those prepositions tell you when.

Prepositions often work with other words to form phrases. “The cat jumped onto the couch” uses the preposition onto to show the relationship between the cat's jumping and the couch. “We'll meet at the park” uses at to show where the meeting will happen.

Here's why they matter: without prepositions, it would be nearly impossible to describe locations, timing, or how things relate to each other. Try describing where you left your homework without using words like in, on, by, or near. You'd struggle! Prepositions are the glue that connects nouns and pronouns to the rest of a sentence, making descriptions clear and precise.