Punctuating a Series

When it comes to punctuation, not all series are created equal. On a discussion board I participate in (as part of Marcia Yudkin’s Marketing for More program), this sentence came up in a discussion about commas:

I dropped the pickle jar, it rolled across the floor, tumbled down the stairs, and shattered in a million pieces.

Is the sentence punctuated correctly?

Look again. You may be focusing on the comma before the word and. It’s an optional comma known as the "serial comma." But it is the series itself that matters. The parts of the series of what the pickle jar did are:

  • rolled across the floor
  • tumbled down the stairs
  • shattered in a million pieces

"I dropped the pickle jar" is not part of the series. It is an independent clause. Therefore, the sentence–as written–requires either a period or a semicolon after jar. Another way of fixing the sentence would be to insert an and after jar.  

This sentence follows the same pattern and is also punctuated wrong:

I wrote the email tips, Gaylen designed the booklet, researched printers, and negotiated a print run of 5000 copies.

Here are three correctly punctuated versions:

I wrote the email tips. Gaylen designed the booklet, researched printers, and negotiated a print run of 5000 copies.

I wrote the email tips; Gaylen designed the booklet, researched printers, and negotiated a print run of 5000 copies.

I wrote the email tips, and Gaylen designed the booklet, researched printers, and negotiated a print run of 5000 copies.

In each sentence above, the comma after printers is optional.

I prefer the first version, with a period after tips. The short, crisp sentence focuses on just one thing–what I did. The next sentence states what Gaylen did.

Whenever you are unsure about the correct punctuation in what seems to be a series, see if you can break the sentence in two. If you can, do it. Also, use your grammar and spelling checker. Microsoft Office does a fine job of finding such errors.

Lynn
Syntax Training

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By Lynn Gaertner-Johnston

Lynn Gaertner-Johnston has helped thousands of employees and managers improve their business writing skills and confidence through her company, Syntax Training. In her corporate training career of more than 20 years, she has worked with executives, engineers, scientists, sales staff, and many other professionals, helping them get their messages across with clarity and tact.

A gifted teacher, Lynn has led writing classes at more than 100 companies and organizations such as MasterCard, Microsoft, Boeing, Nintendo, REI, AARP, Ledcor, and Kaiser Permanente. Near her home in Seattle, Washington, she has taught managerial communications in the MBA programs of the University of Washington and UW Bothell. She has created a communications course, Business Writing That Builds Relationships, and provides the curriculum at no cost to college instructors.

A recognized expert in business writing etiquette, Lynn has been quoted in "The Wall Street Journal," "The Atlantic," "Vanity Fair," and other media.

Lynn sharpened her business writing skills at the University of Notre Dame, where she earned a master's degree in communication, and at Bradley University, with a bachelor's degree in English.

3 comments on “Punctuating a Series”

  • Since there is a second subject introduced after the first comma, I’m left wondering who or what is the subject after the second comma. Perhaps it was I who tumbled down the stairs! Goodness, I might have shattered in a million pieces as well.

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