This document discusses different types of phrases and clauses that can be found within sentences. It defines phrases as groups of words that do not contain a subject and verb, and identifies four main types: prepositional phrases, infinitive phrases, participial phrases, and gerund phrases. It also defines clauses as groups of words that do contain a subject and verb, identifying four clause types: main clauses, subordinate clauses, relative clauses, and noun clauses. Various examples are provided to illustrate the characteristics and usage of each phrase and clause type.