This document discusses punctuation marks and their uses. It defines punctuation as the use of marks and signs to separate words and clarify meaning in writing. When speaking, tone and pauses can clarify meaning but writing relies on punctuation marks. The most commonly used punctuation marks are then defined, including periods, question marks, and exclamation points. Examples are provided to illustrate how each mark is used. The document goes on to provide examples of sentences and asks the reader to identify the punctuation and determine if each example contains a declarative, interrogative, or exclamative sentence.