The document outlines the basic structure of English sentences and questions. It explains that most English sentences can be reduced to a subject, verb, and optional object. Questions follow a similar structure but start with an interrogative word like who, what, when, where, or why, followed by an auxiliary verb and the subject and main verb. The auxiliary controls the tense of the question and is what gets conjugated, not the main verb. The subject performs the action indicated by the main verb.