The document provides rules for using who and what in questions based on whether the subject or object is somebody or something. It gives examples like "Jack loves Rose" where Jack is the subject, Rose is the object, and the questions are "Who loves Rose?" and "Who does Jack love?". It also covers examples like "My mom called Sandra" and rules for questions depending on whether the subject or object is somebody/something and whether an auxiliary verb like "do", "does", or "did" should be used.