The Comma Rules That Matter in Academic Writing

The “Grandma” Rule: Why One Comma Can Ruin Your Abstract

You have probably heard the classic joke:

• Without a comma: “Let’s eat Grandma.” (You are a cannibal).
• With a comma: “Let’s eat, Grandma.” (You are a polite grandchild).

It’s funny in a joke. It is not funny in a PhD thesis.

In academic writing, a misplaced comma doesn’t just look bad—it changes your data.

• Sentence A: “The patients, who took the medication, recovered.” (This means all patients took it and all recovered).
• Sentence B: “The patients who took the medication recovered.” (This means only the specific ones who took it recovered; the others didn’t).

See the difference? One comma changes the entire result of your experiment.

The “Breath” Myth Most students at UiTM and UM are taught a dangerous lie: “Put a comma where you take a breath.”

Stop doing this. Academic sentences are often long and complex. If you put a comma every time you breathe, your paragraph will look like a chopped salad.

Commas are not for breathing. They are traffic signals. They tell the reader when to stop, when to yield, and when to connect two ideas. If you put a red light (comma) in the middle of a highway (subject-verb connection), you cause a crash.

In this post, we are going to ignore the hundreds of obscure grammar rules and focus on the 3 Rules that actually matter for getting your thesis accepted.

What is a Comma and Why is it Important?

A comma is necessary for a sentence to be considered complete.

In order to understand the importance of commas, it is important to know what they are and what they do.

Commas are used to separate a series of words in order to make it clear which words belong together and which words are on their own.

A comma can also be used at the end of a sentence that might not have needed one if the sentence was shortened.

When Should a Comma be used in Articles?

In the English language, commas are used to separate sentences within a paragraph. A comma is not always necessary, but it is useful in terms of clarity and readability.

Commas can be omitted when they serve no grammatical function such as separating clauses or phrases–for instance, in the below sentences:

“I like you because you are great”

“I went to the store and I bought some apples”.

Comma Rules in Academic Writing

A comma is a punctuation mark, usually denoted by the symbol “,” and can be used in writing to introduce items in a list, separate geographical locations, or to set apart clauses within a sentence.

Commas have many uses in academic writing and they are often used incorrectly. One of the more common mistakes is an omission of commas where they should be used. Often times this happens at the end of sentences when there are two independent clauses separated only by a comma.

In order for commas to correctly function as separators, they need to separate words, phrases or clauses that provide more information about another part of the sentence. They also need to be placed before conjunctions that join sentences together such as “and” or “but”.

Correct Conventions for Comma Usage

Commas are the most misused punctuation marks of all time. But, contrary to popular belief, commas can be your best friend and not your worst nightmare. They just need to be used correctly.

We use commas in these three main places:

1) To offset dialogue from a character in a novel or an article

2) To separate list items

3) To offset non-essential clauses or phrases from the rest of the sentence

Commas and Punctuation Marks: Grammar Mistakes that Affect Meaning

1. Do You Know the Difference Between Commas and Periods?

“The following is a list of rules for using commas and periods in English.”

Commas are often used to separate two or more words that have been inadvertently run together. They can also be used to separate two or more adjectives that modify the same noun, such as “tall, dark, and handsome man” or “small, round cake.”

Periods are generally used at the end of a sentence. But they can also be used in place of a comma when an introductory phrase comes before the main sentence. For example:

“Before arriving in New York City, I had never seen such tall buildings.”

2. Why Research Articles Often Include Quotation Marks and Commas

Quotation marks and commas are used to ensure that the reader knows which words are from the author of the article and which words are not.

Without quotation marks or commas, it would be hard for readers to tell what is being quoted or what the author is expressing on their own. Research articles often use these punctuation in order to make sure that readers know which is which and can distinguish one from the other.

3. When to Use Colon, Semicolon, Quotation Mark, or Comma in a Sentence

Colon is used in two situations:

1. Introducing a list:

2. Separating a list from the rest of the sentence.

Semicolon is mainly used as a substitute for the period or equal sign, when you want to fit more than one sentence into one grammatical unit and use conjunctions such as “and,” “or,” “but” between them. Quotation marks are used to show that words are quoted from someone else, and commas are mainly used to separate clauses in a sentence, put phrases and clauses together, or set off an interjection or aside.