This document discusses sentence relatedness and transformational grammar. It provides four ways that sentences can be related: 1) having the same phrase structure but different meanings, 2) having different meanings but the same structure, 3) differing in structure but having the same meaning, and 4) having structural differences corresponding to meaning differences. It also discusses Chomsky's theory of deep and surface structures related by transformational rules, and provides examples of active/passive, there sentences, and prepositional phrases being transformed. Wh-questions are formed via rules that move auxiliaries and wh-words.