This document discusses indirect questions. Indirect questions are used to be polite, especially in formal situations or when talking to strangers. An indirect question contains two clauses - a main clause that introduces the question, followed by a dependent clause that contains the actual question in a statement form rather than directly asking a question. Some common introductory words and phrases for the main clause are "I'd like to know", "Tell me", "Do you know", etc. The document provides examples of direct questions and their indirect equivalents. It also provides some grammar tips for forming indirect questions, such as not using auxiliary verbs like "do", "does", or "did" in the dependent clause.