1) The document discusses the expressions "would rather" and "had better" followed by the bare infinitive. "Would rather" indicates preference, while "had better" warns against something and implies a problem may arise if the advice is not followed. 2) Examples are provided to illustrate the use of each expression, and exercises ask the reader to complete sentences using "would rather" or "had better" correctly. 3) The document provides advice for various situations using "had better" to emphasize potential problems that could occur if the advice is not followed.