This document discusses fragments and run-on sentences. It defines a fragment as an incomplete sentence missing a subject, verb, or complete thought. Run-ons are formed when two complete sentences are joined incorrectly without proper punctuation. There are two types of run-ons - fused sentences with no punctuation and comma splices joined only by a comma. The document provides examples and ways to correct fragments and run-ons, such as adding missing elements, attaching to another sentence, or using punctuation like periods, semicolons, commas with conjunctions, or dependent words.