A comma (,) separates a series of independent sentences, nouns, adjectives, verbs, or phrases. That sentence you just read was a good example of commas separating nouns in a series. When a comma connects two independent sentences, you’ll usually see it with a conjunction (like
and, but, or or). For example: “He went to the movies
, and his wife went to the mall.”
A comma can also be used to separate nonessential details in a sentence. For example: “The boy
, who has red hair
, goes to my school.” Who has red hair, is information that doesn’t change the meaning of the sentence if it’s removed. Putting commas around an extra detail like this helps keep it from cluttering the sentence.