Some grammar and punctuation books may list 50 comma rules. Here are the four comma rules that will serve you in just about any situation.
1. A comma separates items in a series of three or more:
I went to the store and bought anchovies, feta cheese(,) and cereal.
2. A comma separates independent clauses (complete sentences) when they are joined by a conjunction such as and, but, or, nor, for or yet:
I wanted to go to the party, but I wasn’t invited.
3. A comma is used after an introductory dependent clause such as a prepositional phrase:
During our meeting yesterday, John left the room to meet with a client.
4. A comma sets off any non-essential information:
Our annual retreat, held every January, will be in Aspen this year.
Insert commas where necessary. Which comma rule applies?
1. Her internship is ending so she’s starting grad school in August.
2. Running through the hall he tripped over a plant stand.
3. The new boss in a departure from tradition gave all employees his home phone number.
4. She is active in the Charity Mentoring and Birthday Committees.
5. Bill Gates one of the world’s richest people is very charitable.
6. I would organize the meeting but I am too busy to take on another obligation.
7. Where are you going for your vacation Carlos?
8. Brian is taking the Bar Exam next week but he hasn’t had a job offer yet.
9. California’s Bar Exam perhaps the most difficult in the nation has a pass rate of only 30%.
10. His evaluations which are among the best in his department still did not result in a promotion or a raise.
Copyright 2007 Judith R. Birnberg/Write It Right All rights reserved.