This document discusses three types of questions in English - yes/no questions, WH- questions, and tag questions. It provides examples of how to form questions for each type in various tenses, including present, past, future, perfect, continuous and perfect continuous. Yes/no questions typically begin with an auxiliary verb and expect a yes or no answer. WH- questions begin with interrogative words like what, when, where, who, why, how, how much/many and provide more open-ended answers. The document also defines important grammar terms needed to understand questions, such as verbs, nouns, subjects, objects and tenses.