This document discusses prepositions and provides examples of their uses. Prepositions show direction, time, place, and spatial relationships. They are used before nouns, pronouns, or noun phrases. Examples are given for prepositions of direction, time, place, location, and spatial relationships. Rules are provided for using prepositions like "to," "in," "at," "on," "over," "under," and more depending on whether referring to a direction, point in time, location, or spatial relationship between objects.