H1: Comma with Compound Sentences: Use commas to separate independent clauses when they are joined by any of these seven coordinating conjunctions: and, but, for, or, nor, so, yet. See Writing for Success Section 3.1 pp. 103-104 or RULE 1 of the following: https://www.iue.edu/hss/writingcenter/documents/Commas.pdf
Everyone in the class got some candy, and I want some candy too.
(Notice how the underlined clauses could be their own complete sentences? When that’s the case on both sides of the conjunction, use a comma before the conjunction.)
DO NOT use a comma if there is not a new subject in the second clause. (H13)
John felt he could save the world and still be home for dinner that night.
H1-X: In most cases, don’t put the comma after the coordinating conjunction in a compound sentence. The comma goes before the conjunction.
I like flying, but I prefer to drive. (Correct)
I like flying but, I prefer to drive. (Incorrect)