This document discusses fragments, run-ons, and parallelism in sentences. It defines a fragment as an incomplete sentence that is missing a subject, verb, or complete idea. Run-ons occur when there are two or more independent clauses in a sentence joined incorrectly without punctuation. Parallel structure means putting all items in a series in the same grammatical form. The document provides examples and explanations of these concepts as well as ways to correct fragments and run-ons.