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How to Use Semicolons

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You are at:Home » How to Use Semicolons
Grammar Girl

How to Use Semicolons

A memory trick and chart will help you remember how to use semicolons.

By Mignon FogartySeptember 11, 2018No Comments5 Mins Read
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4 Reasons to Use Semicolons

  1. To separate clauses
  2. To create variety
  3. To emphasize relatedness
  4. To separate items in a complex list

 
Today’s topic is semicolons. I get a lot of questions about semicolons, so it’s time to clear up some confusion.

Semicolons Separate Clauses

Semicolons separate things. Most commonly, they separate two main clauses that are closely related to each other but could stand on their own as sentences if you wanted them to.

Here’s an example:

I have a big test tomorrow; I can’t go out tonight.

The two clauses in that sentence are separated by a semicolon and could be sentences on their own if you put a period between them instead:

I have a big test tomorrow. I can’t go out tonight.

Semicolons Create Variety

One reason you might choose to use a semicolon instead of a period is if you wanted to add variety to your sentence structure; for example, you might use a semicolon if you thought you had too many opens in a new windowshort, choppy sentences in a row.

Semicolons Emphasize Relatedness

Another reason to use a semicolon is to draw attention to how related your two clauses are. The semicolon in our example sentence highlights that the reason you can’t go out tonight is that you have a big test tomorrow. You wouldn’t write, “English is my fifth period class; I can’t go out tonight,” because those two main clauses have nothing to do with each other. I can’t think of a single reason why English being fifth period would mean you can’t go out tonight.

Semicolons and Coordinating Conjunctions

You should never use a opens in a new windowsemicolon and a coordinating conjunction such as “and,” “so,” and “but” to join two main clauses; that’s the job of a opens in a new windowcomma. If you want to use a coordinating conjunction, you’d write it like this:

I have a big test tomorrow, so I can’t go out tonight.

Nevertheless, there are a couple of instances where it’s OK to use a semicolon with a coordinating conjunction.

Semicolons Can Join Complex Clauses with a Coordinating Conjunction

First, if you have a long sentence with multiple independent clauses, and some of those clauses contain internal punctuation such as a opens in a new windowcomma, you can use a semicolon with a coordinating conjunction to make the separation between clauses more clear. Here’s an example:

If you want me to go out tonight, you need to help me with my homework first; and if you say no, I’ll know that you don’t really care about going out.

Because each half of that long sentence has a conditional clause that must contain a comma, it’s OK to use a semicolon before the “and” that separates those two parts. You could make them two sentences, but you don’t have to; and because they are so closely related, it makes a lot of sense to have them be together separated by the semicolon. The “and” after the semicolon is actually optional in this case, but I think it adds to the flow of the sentence.

Semicolons Can Separate Items in a Complex List

The second instance in which it’s OK to use a semicolon with a coordinating conjunction also occurs when you have an excess of commas: it’s when you need to separate list elements that opens in a new windowcontain commas themselves.

Here’s an example:

This week’s winners are Joe from Reno, Nevada; Diane from Phoenix, Arizona; and Matt from Irvine, California.

Because each item in the list requires a comma to separate the city from the state, you have to use a opens in a new windowsemicolon to separate the items themselves.

Notice again that both times you can use a semicolon with a coordinating conjunction such as “and,” it’s because commas are already being used for something else, so using another comma could be confusing to readers.

Semicolons with Conjunctive Adverbs and Transitional Phrases

Finally, you use a semicolon when you use a conjunctive adverb or transitional phrase to join two main clauses.

Conjunctive adverbs are words such as “ opens in a new windowhowever,” “therefore,” and “indeed.” Here’s an example of how you could use them with semicolons:

I have a big test tomorrow; therefore, I can’t go out tonight.

A transitional phrase is something like “for example” or “in other words.” A sentence with a transitional phrase could read like this:

I have a big test tomorrow; as a result, I can’t go out tonight.

Coordinating Conjunctions Versus Conjunctive Adverbs

Sometimes people seem frustrated because they have to remember to use commas with coordinating conjunctions and semicolons with conjunctive adverbs most of the time. If you can’t keep the difference straight in your head, it can help to remember that commas are smaller than semicolons and go with coordinating conjunctions, which are almost always short two- or three-letter words—small words, small punctuation mark.

Semicolons are bigger and they go with conjunctive adverbs and transitional phrases, which are almost always longer than three letters—bigger words, bigger punctuation.

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Common Coordinating Conjunctions
Common Conjunctive Adverbs
Common Transitional Phrases
Use these with commas to join main clauses Use these with semicolons to join main clauses Use these with semicolons to join main clauses
and
accordingly
after all
but
again
as a matter of fact
nor
also
as a result
or
besides
at any rate
so
consequently
at the same time
yet
finally
even so
for
furthermore
for example
hence
for instance
however
in addition
incidentally
in conclusion
indeed
in fact
likewise
in other words
moreover
in the first place
namely
in the meantime
nevertheless
of course
nonetheless
on the contrary
otherwise
on the other hand
similarly
still
that is
then
therefore
thus

More Semicolon-Related Reading

France Debates the Future of the Semicolon (April 4, 2008)

Celebrating the Semicolon in a Most Unlikely Location (February 18, 2008)
Has Modern Life Killed the Semicolon (June 20, 2008)

Mignon Fogarty
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Mignon Fogarty is the founder of Quick and Dirty Tips and the author of seven books on language, including the New York Times bestseller "Grammar Girl's Quick and Dirty Tips for Better Writing." She is an inductee in the Podcasting Hall of Fame, and the show is a five-time winner of Best Education Podcast in the Podcast Awards. She has appeared as a guest expert on the Oprah Winfrey Show and the Today Show. Her popular LinkedIn Learning courses help people write better to communicate better. Find her on Mastodon.


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