The document discusses the four types of sentences: assertive, interrogative, imperative, and exclamatory. It provides examples of each type and notes their punctuation. Assertive sentences make statements and end with a period. Interrogative sentences ask questions and end with a question mark. Imperative sentences give commands or requests and end with a period. Exclamatory sentences express strong feelings and end with an exclamation point. Students are given an exercise to identify the type of each example sentence.