This document discusses parallel structure and provides examples of sentences with and without parallel structure. Parallel structure involves using the same grammatical structure in a series of phrases or clauses. It is important for maintaining consistency and showing that ideas have equal importance. Some key points made include: using consistent verb forms and parts of speech; joining parallel structures with coordinating conjunctions like "and"; and correcting sentences by making grammatical elements match throughout. The document provides tests to identify proper parallel structure in sample sentences.