Punctuation Using Commas PowerPoint supports Common Core; comma rules and using comma punctuation correctly in writing elements and sentence structure. Good test prep. Explains using commas with lists (including the oxford comma), dates, addresses, and titles. Discusses using commas when joining independent and subordinate clauses in compound and complex sentences. Also covers nonessential clauses, phrases and words, introductory clauses, and separating coordinate adjectives. Animated clips. Use