Commas help organize your ideas. They show pauses, separate parts of a sentence, and keep things clear for your reader. Let’s look at the most useful rules — with simple examples!
1. Use a comma before and, but, or, so (if both sides are complete sentences)
- He opened the window, and a bird flew in.
- I studied all night, but I still felt nervous.
2. Use a comma after an introduction
- After lunch, we went back to work.
- During the meeting, I took notes.
3. Use commas in a list (three or more items)
- I bought eggs, milk, and bread.
- She likes singing, dancing, and acting.
4. Use commas to add extra (non-essential) info
- My brother, who lives in Canada, is visiting soon.
- That movie, which you love, is on TV tonight.
5. Use commas around appositives (extra info about a noun)
- Paris, the capital of France, is a beautiful city.
- My friend Sam, a guitar player, gave me a lesson.
6. Use commas in direct address (speaking to someone)
- Emma, could you help me?
- Thanks for coming, everyone.
7. Use commas in quotes
- He said, “I’ll be there soon.”
- “I’m tired,” she whispered, “but I’ll finish this.”
8. Use commas in dates, addresses, and big numbers
- We met on June 4, 2023, in New York.
- Send it to 22 Maple Street, Austin, TX 78701.
- The prize is $10,000!
