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Let’s Eat Grandma: The Rule of Commas

We’ve all heard the “let’s eat grandma” joke and talked about “the strippers, JFK and Stalin.” The comma is one of the most discussed, used, and misused punctuation mark in English grammar. You might find yourself writing shorter sentences because you’re not sure where that pesky mark needs to go. On the other hand, maybe you try to fit as many commas as you can into your writing and passionately debates the Oxford comma when prompted (or not prompted). No matter where you stand on comma usage, it never hurts to have a refresher course, right?

What's a comma?

What is a comma?

Maybe you’ve heard this classic grammar joke:

What’s the difference between a cat and a comma?

A cat has claws at the end of its paws. A comma’s a pause at the end of a clause.

This actually is a good way to remember a comma’s function. A period marks the end of a sentence, while a comma indicates a pause somewhere in the middle. In general, commas are used to provide clarity in writing. They can separate words, phrases, or clauses.

Comma Splices

A comma can be used to separate two independent clauses, but only if it is used with a coordinating conjunction.

            Example: Yesterday I went to the beach, but it rained the whole time I was there.

This could be split into two standalone sentences, or the two clauses could be separated by a semicolon. A comma alone is not strong enough to separate two independent clauses. If you forget the coordinating conjunction, this is called a “comma splice.”

Separating With Commas

Commas can also be used to separate a word or phrase from the rest of a sentence. This could be an introductory phrase, an appositive phrase, a question, or a direct address.

An introductory phrase starts a sentence.

Example: Before school starts, make sure that your homework is finished.

An appositive provides additional information about the noun in a sentence. If the appositive information could be removed without changing the sentence’s meaning, it should be set apart with commas. If the information is essential to the sentence, however, it does not require them.

Example: My mom, Elizabeth, is a phenomenal pianist.

Example: The movie Princess Diaries is one of the best movies of all time.

If you address someone within the course of a sentence, you can offset that person’s name with a comma.

Example: Mom, I can’t find my favorite shoes!

If you include a question tag at the end of a sentence, that can also be offset with a comma.

Example: You haven’t seen my shoes, have you?

Serial Commas

Perhaps the most hotly debated punctuation mark is the serial comma, also known as the Oxford comma. This is the last punctuation in a list of things. It comes before the conjunction.

 Example: I bought apples, bananas, and a watermelon at the farmer’s market.

Many people believe this is not necessary in every case, while others believe it provides clarification. Ultimately, commas are used to provide clarification. Not every comma rule is hard and fast, and many are open to personal preference or interpretation. However, the above rules are a good place to start!

What's the difference between a cat and a comma? Commas are tricky, but these rules might help. They probably won't help with your cat, though. Click To Tweet

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Cassie LaJeunesse

About Cassie

Cassie LaJeunesse is doing everything in her power to prove wrong the people who scoffed at her English degree. A former college newspaper editor, she now writes and edits content for a regional magazine. She also finds time to freelance for her alma mater and other publications, writing and editing in a variety of styles and subjects. Now that she has completed her degree, she uses her free time to read as much as possible, sing in a choir, and hang out with her cat, Gilbert.

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