What else can colons do? Choose three more uses below. a. Colons separate items in a list; the final colon is optional. b. Colons can be used after the greeting in formal letters c. Colons connect two clauses together with a FANBOYS word. d. Colons can be used between an independent clause and other ideas directly related to it. e. Colons can add extra emphasis to the second clause in a compound sentence. f. Colons set off nonessential items in the middle of a sentence.