This document discusses different types of phrases and their functions in sentences. It defines phrases as groups of words that act as parts of speech but cannot stand alone as sentences. The main types of phrases discussed are noun phrases, verb phrases, adjective phrases, adverb phrases, and preposition phrases. It provides examples to illustrate the structure and function of each phrase type, such as serving as subjects, objects, or modifiers within sentences. It also discusses the roles that phrases can play, such as direct objects, indirect objects, and subject/object complements.