Commas Series
Punctuating elements in a series
Commas with elements listed in a series
| TWO ELEMENTS | MORE THAN TWO ELEMENTS |
|---|---|
Usually we use and to join similar elements: two verbs, two nouns, two adjectives, etc. It is important to make sure the words are like-word-forms (parallel word forms). |
When listing more than two like-elements, use a comma to punctuate items in a series. Placing a comma before and is optional. See below. |
VERBS The biathlon athlete skis and shoots. |
VERBS A triathlete runs, bikes, and swims. |
NOUNS The biathlon athlete uses skis and a gun. |
NOUNS The athlete uses running shoes, a bicycle, and swim goggles. |
ADJECTIVES The biathlon athlete is strong and focused. |
ADJECTIVES A triathlete is strong, well-trained, and focused. |
ADVERBS In order to win, he must shoot quickly and accurately. |
ADVERBS In order to win, he must run swiftly, gracefully, and boldly. |
PHRASES He must be able to outwit and to out-last the others. |
PHRASES He is able to outwit, out-last and out-play the others. |
CLAUSES The biathlon athlete is a person who knows his strengths and who keeps his focus. |
CLAUSES She was a woman who knew her strengths, who knew how to use her wit, and who wasn't afraid to "stick her head out". |
Related page: using commas to set of comments or clauses
Comma before "and"
| COMMA BEFORE AND | NO COMMA BEFORE AND |
|---|---|
Some writing style manuals recommend using a comma when a conjunction joins the last two elements of a series: Chicago Manual of Style, Fowler's Modern English Usage, The Elements of Style, The U.S. Gov. Printing Office ,MLA, Harvard style manuals, and The Oxford Style Manual |
Some writing style manuals recommend not using a comma when a conjunction joins the last two elements of a series unless it causes the meaning to become unclear: Associated Press, The New York Times, The Times |
I would like a pastrami, cheese, peanut butter, and jelly sandwich. |
I would like a pastrami, cheese, peanut butter and jelly sandwich. |
I would like a pastrami and cheese, and peanut butter and jelly sandwich. |
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I would like a pastrami, a cheese, a peanut butter, and a jelly sandwich.
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I would like to thank my brothers, Sarah, and Mary. |
I would like to thank my brothers, Sarah and Mary. |
"The Oxford comma"
"Use commas in place of conjunctions to separate elements in a list of three or more items. The presence or lack of a comma before and or or in such a list has become the subject of much spirited debate. For a century it has been part of OUP to retain or impose this last serial (or series) comma consistently, to the extent that the convention has come to be called the "Oxford comma".…The last commas serves also to resolve ambiguity, particularly when any of the items are compound terms joined by a conjunction…" (Oxford Style Manual 121-2)
References for and against using commas before and or or.
- AP Stylebook. The Associated Press Stylebook and Briefing on Media Law. 42nd ed. New York: Basic Books, 2007. Print. (Against – 32)
- "Extended Rules for Using Commas" #5. The Owl at Purdue. 2009. http://owl.english.purdue.edu/owl/resource/607/02/ (For )
- Huddleston, Rodney and Geoffrey K. Pullum. The Cambridge Grammar of the English Language. Cambridge: Cambridge University Press, 2002. Print. (1738–40)
- MLA Handbook for Writers of Research Papers. 7th ed. NewYork: Modern Language Association of America. 2009. Print. (For –3.2.2.b)
- Sabin, William A. The Gregg Reference Manual:A manual of Style, Grammar, Usage, and Formatting. 11th ed. New York: McGraw–Hill, 2011. Print. (For –162 a.)
- Strunk, William, and E. B. White and Roger Angell. The Elements of Style. 4th ed. Longman, 1999. Print. (Bartleby.com Link ) (For )
- The Chicago Manual of Style. 15th edition. Chicago: University of Chicago Press, 2003. Print. (For – 6.19)
- Ritter, R. M.The Oxford Style Manual,Oxford: Oxford University Press, 2003. Print. (For – 5.5.3)
- University of Oxford "Punctuation" (Against – Link)
- Wikipedia contributors. "Serial comma." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 1 Oct. 2011. Web. 4 Oct. 2011. Link
Word Play— Noun or Verb?
| TWO COMMAS | ONE COMMA | NO COMMAS |
|---|---|---|
All three items are verbs |
Second item is a noun. |
Second and third items are nouns. |
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nonsense (n.) – Something that is silly.
Common Mistakes
| ERROR | FIX |
|---|---|
The appeal of Tesla's Model S lies in its sexy sports car design. (unclear use of modifiers) |
The appeal of Tesla's Model S lies in its sexy, sports-car design. |
Punch mark or fill-in your ballot. (unclear word form meaning) |
Punch, mark, or fill-in your ballot! A comma joins items in a row (same word forms) -- in this case three verbs. Using a comma before or is optional.) |
Pop-Q "Tesla"

Practice 1
Albert "Renaissance man"
Editing
- Add commas and if necessary "and" to the sentences below.
- Compare your response to the answer on the right.
Practice 2

He sails boats and ships.
Word Play — What does each person do?
Remember that punctuation can determine whether a word form is a verb or a noun. One option will be logical. The other option might be silly (nonsense).
- Select a response from the list menu.
- Compare your option choice to the answer by clicking the "check" button to the right.





He
He 
He 
