25.4: Using a Comma to Separate Three or More Items in a Series

Idea to Essay: Collected Strategies and Readings for the College Writer 4e · LibreTexts

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    If a sentence features a list of items, you should use commas to separate these items and avoid confusion for readers. The last comma before the coordinating conjunction that ends the list (typically “and”/” or”) is optional, and different instructors will have different preferences regarding this “Oxford Comma.” If you want to be on the safe side, go ahead and add it—you can never have too much clarity!

    Exercise 25.4: Using a Comma to Separate Three or More Items in a Series

    Read the following sentences and insert commas where necessary.

    1. In Composition 101, we learned how to write using modes like description definition and process analysis.
    2. In Composition 102, we focused on rhetorical appeals like logos ethos and pathos.
    3. In Intro to Literature, we studied writers from the 19th 20th and 21st centuries.
    4. Next fall, I am taking College Algebra U.S. History II Abnormal Psychology and American Literature.
    5. I plan to transfer to Kansas State Fort Hayes or Wichita State when I graduate.

    This page titled 25.4: Using a Comma to Separate Three or More Items in a Series was last modified on Tue, 30 Jun 2026 15:47:14 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by The Butler Community College English Department.