This document discusses three types of sentences in English: declarative/statement sentences, imperative/command sentences, and interrogative/question sentences. It provides examples of each type and explains their structures and forms. Declarative sentences make a statement and have a subject and verb. Imperative sentences give a command and use the base verb form. Question sentences have inverted word order or question words and rising intonation. The document also discusses truth conditional semantics and how language can be used to state facts or present information that is true or false.