CRT Grammar Review
CRT Grammar Review
Commas
Commas are one of the most widely used punctuation marks in the English language. They are used in several places for different reasons.
1. Use a comma before the eight coordinating conjunctions (and, or, so, but, nor, yet, for, although). Examples:
- He came early, but she came late.
- I was ready to leave, but he didn't see my ride.
- I was hungry, and I wanted to eat.
- It was raining, so I walked him to the bus.
2. After a subordinate clause that comes before a main clause. Subordinate clause: has a subject and a verb, but is not a complete sentence. Subordinate clauses are often used to add information to another clause, especially to tell about specific circumstances. Examples:
- When I'm hungry, I go to my favorite restaurant.
- Despite the fact we were tired, we stayed up to watch a movie.
3. Around extra information that does not include a verb. Examples:
- New Hampshire, a state with many tall mountains, is my home.
- My son, Rick, is home from college.
- My father, a good doctor, took care of me when I broke my arm.
4. With non-defining relative clauses. Similar to #3, non-defining relative clauses give additional information about something, but does not define it. Examples:
- Professor Smith, who teaches the evening class, is at home.
- Central Park, which was built by Olmsted, is one of the world's most venerated parks.
5. Between two elements or items in a list. Examples:
- I like bananas, pears and peaches.
- I took a several classes my first semester in college: English 1010, Theatre 1020, Biology 1010 and Math 1050.