EDITING ESSAYS
Chapter 37 • Commas 679
Commas around Appositives and Interrupters
An appositive, a phrase that renames a noun, comes directly before or
after the noun.
Dick, my neighbor, has a new job.
Apartment prices are high at Riverview, the new complex.
An interrupter is an aside or transition that interrupts the fl ow of a
sentence and does not affect its meaning.
Campus parking fees, you should know, are going up by 30 percent.
A six-month sticker will now be $45, if you can believe it.
An interrupter that appears at the beginning of a sentence can be treated
the same as an introductory word group.
As a matter of fact, the fees are the highest of any of the campuses in
the city.
Putting commas around appositives and interrupters tells readers that
these elements give extra information but are not essential to the meaning
of a sentence. If an appositive or interrupter is in the middle of a sentence,
set it off with a pair of commas, one before and one after. If an appositive
or interrupter comes at the beginning or end of a sentence, separate it
from the rest of the sentence with one comma.
Incidentally, your raise has been approved.
Your raise, incidentally, has been approved.
Your raise has been approved, incidentally.
Sometimes, an appositive is essential to the meaning of a sentence.
When a sentence would not have the same meaning without the apposi-
tive, the appositive should not be set off with commas.
The actor John Travolta has never won an Academy Award.
[The sentence The actor has never won an Academy Award does not have the same
meaning.]
The lawyer Clarence Darrow was one of history’s greatest speakers.
[The sentence The lawyer was one of history’s greatest speakers does not have the
same meaning.]
■ For more on
appositives, see
pages 572–74.
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