AI overview
Adpositions are words that show relationships between things, such as where something is located (like "in" or "under"), when something happens (like "ago"), or what role something plays in a sentence (like "of" or "for"). They're important because they help clarify these spatial, temporal, and grammatical connections in language, and the most familiar types are prepositions, which come before their object, and postpositions, which come after.
AI-generated from the Wikipedia summary — may contain errors.