1. The document discusses the use of punctuation marks such as periods, exclamation points, commas, and hyphens in compound words and sentences. 2. It provides examples of how each punctuation mark can be used including with exclamatory and interrogatory sentences, declarative sentences, and compound words formed from verbs and prepositions. 3. The document also discusses exceptions to rules around compound words and modifiers, and advises looking up unclear cases in the dictionary.