Punctuation For Beginners: All About Commas

Punctuation For Beginners: All About Commas

Welcome to the third post in the series: Punctuation For Beginners. We’ve discussed what punctuation is and why we need it. Last week, I wrote about full stops. In today’s post, we discuss commas.

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These are the most common punctuation marks:

  1. The Full Stop
  2. The Comma
  3. The Question Mark
  4. The Exclamation Mark
  5. The Semicolon
  6. The Colon
  7. The Hyphen
  8. The Em Dash
  9. The Bracket or Parenthesis
  10. The Inverted Comma/Quotation Mark
  11. The Ellipsis
  12. The Bullet Point
  13. The Apostrophe

Today, I will be writing about The Comma.

What are commas?

A comma is a punctuation mark (,)

‘A comma marks a slight break between different parts of a sentence. Used properly, commas make the meaning of sentences clear by grouping and separating words, phrases, and clauses.’ (via Oxford Dictionaries)

[Top Tip: If you need practical help with your grammar, buy The Complete Grammar Workbook.]

Commas are mostly used:

1. In Lists

Commas separate words and phrases in a list. We use them to separate three or more items in a series.

Example: They bought books, pens, staples, and erasers.

When the last comma in a series is placed before ‘and’ or ‘or’, it is known as the serial comma or Oxford Comma. Not all writers use this. It often depends on which style guide you follow. However, using it generally helps you to avoid misunderstandings.

Example: My favourite sandwiches are chicken, bacon and ham and cheese. (via)

If you omit the final comma in this sentence, the sandwiches could be either bacon and ham sandwiches, or ham and cheese sandwiches. Add an Oxford comma to make it clear which one you mean.

‘There are people who embrace the Oxford comma and those who don’t, and I’ll just say this: never get between these people when drink has been taken.’ ~Lynne Truss, Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation

2. To Separate Clauses

Commas indicate where one phrase or clause ends and another begins.

a) Use them where two independent clauses (sentences that are complete, and make sense on their own) are joined by conjunctions like ‘and’, ‘or’, and ‘but’.

Example: I walked to the shops, and I took the bus home.

Tip: Avoid using a comma between two main clauses, especially if they are long. If you omit the conjunction, it is known as the comma splice error. Rather use a full stop.

b)  Use them after a relative clause, which is a clause beginning with ‘who’, ‘which’, ‘that’, ‘whom’, or ‘where’.

Example: Writers, who write every day, create a daily habit.

c)  Use them when you start a sentence with a subordinate or dependent clause. This type of clause does not express a complete thought. It is not a complete sentence.

Example: After we changed the time of the meeting, we left the office.

d)  Use them after introductory words or phrases.

Example: Once again, I was congratulated by my manager.

3. In Direct Speech

Use them to quote somebody’s words exactly as they were said.


James answered, ‘We definitely have a problem.’
‘We definitely have a problem,’ he said.

4. To Mark Off Certain Parts Of A Sentence

Use them to add information that could be inserted in brackets or between dashes. This information is not essential for the main sentence to make sense.

Example: Her latest book, The Art of Memoir, was a bestseller.

5. With However

Use them before and after words like ‘however’ and ‘nevertheless’.

Example: However, she was still late for the bus.

Tip. Don’t use a comma after however when it means ‘in whatever way’.

Example: However hard she tried, she did not make the cut.

6. To Separate Adjectives

We need commas if the adjectives are separate descriptions for an object or person. (Example 1) However, a list of adjectives does not always require commas.  We don’t need commas if the adjectives are part of the same object. (Example 2)

Example 1: Sipho’s beautiful, snobbish, dangerous girlfriend
Example 2: Sarah’s blue silk skirt

7. To Distinguish A Name From The Rest Of The Sentence

If you are addressing a person directly, use commas to set off their titles, names, or terms of endearment.


Tell me, Holly, why were you early today?
Yes, my darling, I will.
Good morning, General.

These are the most common rules for using the comma. For a more detailed list, I suggest you read Comma Rules

[Top Tip: If you need practical help with your grammar, buy The Complete Grammar Workbook.]

 by Amanda Patterson

If you enjoyed this post, read:

  1. Punctuation For Beginners: All About Full Stops
  2. Punctuation For Beginners: What Is Punctuation?
  3. All About Parts Of Speech
  4. 10 Extra Ways To Proofread Your Writing Like A Boss
  5. The Ultimate Grammar Cheat Sheet for Writers (Infographic)

[Top Tip: If you need practical help with your grammar, buy The Complete Grammar Workbook.]

Posted on: 23rd January 2018