This document provides information about prepositions including their definition, types, and common uses. It discusses that prepositions show the relationship between nouns, pronouns, verbs, and adjectives. There are three types of prepositions - simple prepositions like "at" and "by", compound prepositions formed by combining a preposition with another part of speech, and phrase prepositions which are groups of words used as a preposition. The document also lists nine common relationships indicated by prepositions such as place, time, agency, manner, cause, possession, measure, contrast, and motive. Finally, it includes some pictorial illustrations of prepositions and their uses.