Here’s a list of how we use comma:
1. Use before any coordinating conjunction (and, but, for, or, so, yet, nor) that links two independent clauses. An independent clause includes both a subject and a verb and can stand on its own as a sentence.
Example: She went running, and she saw a bird.
2. Use after a dependent clause that starts a sentence.
Example: When she was running, she saw a bird.
3. Use to offset appositives from the rest of the sentence. Appositives act as a similar word for a juxtaposed word or phrase.
Example: While running, she saw a dove, a kind of bird.
4. Use to separate words and word groups in a simple sentence.
Example: My grandmother’s estate goes to her husband, son, daughter and nephew.
5. Use to separate two adjectives.
Example: My mother is a strong, healthy woman.
6. A comma is generally unnecessary if the subject does not appear in front of the second verb.
Example: Leslie saw that her mother was busy, and prepared to leave.
7. Use a comma when a dependent clause is in the beginning of the sentence.
Example: If you are not sure about your answer, let me know now.
8. Use to set off non-essential words, phrases and clauses.
Example: Romina, who is the eldest, gave her birthday wish.
9. Use to introduce or interrupt direct quotation.
Example: She said, “I don’t know.”
“Why,” I asked, “don’t you care?”
Use comma in the following cases:
- After an introductory clause.
- After a long introductory prepositional phrase or when there’s more than one introductory prepositional phrases.
- After introductory verbal phrases, absolute phrases or when there are some appositive phrases.
- When there is a distinct pause.
- To avoid confusion in the sentence structure
- To separate the subject from the predicate.
- After a brief prepositional phrase.
- After a restrictive appositive phrase.
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