COMMAS. Commas Rule 1: Use commas to separate words and word groups with a series of three or more. Example: I'm going camping and I'm taking bread, milk, - ppt download
【TED-Ed】Comma story - Terisa Folaron - VoiceTube: Learn English through videos!
5. Additional Comma Uses and Misuses - PDF Free Download
Oxford commas, Nelson Mandela, and Stephen King | Sentence first