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Don't confuse a compound sentence with a compound predicate. A compound sentence has at least two independent clauses, each containing a subject and a predicate.
Susan finished college, and she is looking for a job.
A compound predicate contains one subject and at least two predicates.
Susan finished college and is looking for a job.
A comma is not needed with a compound predicate.
However, when the compound predicate has three or more verbs, it is better to use a comma.
If the following sentence is a compound predicate, would someone please tell me why there is a comma after the word "moderated"? Thanks.
"Comments are moderated, and will not appear until approved."
|Jennifer Mathes, Ph.D.|