The semicolon is one of the most misunderstood forms of punctuation even though the rules for use are fairly simple. Beware, students—ACT creators loves to test on this punctation mark. When do you use a semicolon? When there are two independent clauses (can stand alone as sentences) on either side. The two clauses are not joined by FANBOYS (coordinating conjunctions: for, and, nor, but, or, yet, so). The semicolon is only correct if it could be replaced by a period. A semic