The document discusses different types of phrases. A phrase is a group of words that functions as a single part of speech within a sentence but lacks both a subject and a verb. There are two main types of phrases: noun phrases and verb phrases. Noun phrases include modifiers like adjectives and determiners and function as subjects, objects, or complements, while verb phrases contain verbs. Common phrase types include prepositional, infinitive, participle, appositive, gerund, and absolute phrases.