This version of Favourite Articles has been archived and won't be updated before it is permanently deleted.
Please consult the revamped version of Favourite Articles for the most up-to-date content, and don't forget to update your bookmarks!
This is the second of two articles on commas. See "Commas Count: Necessary Commas" in the December issue.
One of the best sentences in Strunk and White’s classic writing guide, The Elements of Style, is this: "A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts."
I would go further: a sentence should contain no unnecessary commas for the same reason that a symphony should have no unnecessary pauses. True, commas add rhythm, and more importantly clarity, to our writing, something we saw in "Commas Count" in the December issue. But, if we use too many, of them, our writing becomes difficult, for people, to read, and our ideas end up fragmented, instead of connected.
For years participants in my grammar and writing workshops have magnanimously imparted their golden rule for commas: use a comma whenever you would take a breath. And for years I have regretfully but pointedly burst their bubble. That simple rule, which so many have clung to since their tender years, works occasionally (even often, if you’re a speechwriter or playwright), but it also gives rise to the superfluous commas that pollute our prose, bobbing up disconcertingly like plastic bottles in the waves.
While comma use is sometimes a matter of personal taste—something we’ll look at later—there are certain places where this mark does not belong.
What grammar hath joined together, let no comma put asunder. Don’t let a comma split the grammatical bond between a subject and its verb, a verb and its object (or its subject complement, with a linking verb like to be) or a preposition and its object, even if you think a pause is in order.
Note that it is perfectly acceptable to interrupt these grammatical unions with a parenthetical element and a pair of commas (remember, a pair).
As we saw in "Commas Count," the coordinator is a comma that precedes a coordinating conjunction (for, and, nor, but, or, yet, so) that joins two independent clauses. Be sure to put the comma before the conjunction, not after it.
When the elements joined by a coordinating conjunction are not independent clauses, there is usually no need for a comma (though see "Bending the rules" at the end of this article).
A restrictive element is the opposite of a parenthetical element. It is an element—usually descriptive—that is necessary to the sentence because it defines or limits (restricts) the word it describes. Do not use commas with restrictive elements.
To test whether an element is restrictive, try omitting it from the sentence. If the sentence’s main message is no longer clear, the element is restrictive. If the main message is fine, the element is parenthetical.
Commas between items in a series stand for the word and. Don’t place a comma before the first item or after the last, since you can’t use and in either spot.
Remember that the comma before and in a series is optional.
And with a series of modifiers? Therein lies a bewildering comma conundrum: sometimes you need commas; sometimes you don’t. The decision depends on whether the modifiers are coordinate or cumulative.
Coordinate modifiers all independently modify the same word. You can rearrange their order and insert the word and between them. A series of coordinate modifiers requires commas.
Cumulative modifiers do not separately and equally modify the word they appear with. Instead, they build or lean upon one another. You cannot change their order or insert and between them. A series of cumulative modifiers takes no commas.
To complicate matters, a series may include both coordinate and cumulative modifiers. But if you apply the dual test of rearranging and inserting and, you should get the commas right.
Punctuation is like any art: once you have mastered the principles, you can bend them. It’s fine to depart from the comma rules from time to time—if you have a good reason.
For clarity:
For emphasis:
For rhythm:
George Bernard Shaw once said, "The golden rule is that there are no golden rules." That’s pretty much what I tell my workshop participants as I strip away their lifelong illusions about commas and breathing. Instead of one golden rule, we have many plastic ones—but that’s far more practical, especially if we plan to break one now and again.
Strunk, William, Jr., and E.B. White. The Elements of Style. 3rd ed. New York: Macmillan, 1979.
© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
Writing tools – Favourite Articles
A product of the Translation Bureau