This document discusses different types of sentences in English based on their structure and purpose. There are three main types of sentences: 1. Simple, compound, and complex sentences. Simple sentences express a single idea, compound sentences join two independent clauses, and complex sentences contain one main clause and at least one dependent clause. 2. Declarative, imperative, and interrogative sentences. Declarative sentences make statements, imperative sentences give commands, and interrogative sentences ask questions. 3. Exclamatory sentences are used to express strong emotions and end with an exclamation point. They often use words like "what" or "how" followed by a noun, adjective, or verb.