A compound sentence is a sentence that has at least two independent clauses joined by a comma, semicolon or conjunction. An independent clause is a clause that has a subject and verb and forms a complete thought. Compound sentences differ from other sentence types, and if you leave out their joining elements, you turn them into run-on sentences. In this lesson, we'll cover compound sentences and how to to correctly punctuate them. Working through this punctuation worksheets will develop stron