This document defines prepositions and provides examples of common prepositions and prepositional phrases. Prepositions indicate location in space, time, or possession and must have an object. Common prepositions include by, beside, between, near, under, over, inside, outside, above, below, behind, before, after, in, at, on, to, into, onto, through, of, and to. A prepositional phrase consists of a preposition followed by a noun, gerund, or clause. Examples of prepositional phrases are provided.