This document discusses sentence fragments and provides examples of different types of fragments. It explains that a sentence fragment is missing something that would make it a complete sentence, such as a verb or part of a verb phrase. Some fragments contain subject-verb relationships but are still incomplete because they are subordinate clauses. The document cautions against strings of prepositional phrases that do not establish a subject-verb relationship to form a complete thought. It provides additional resources for learning to identify clauses, phrases and fragments.