 When English speakers ask questions that start with WH or H, their voice goes down at the end. These are called WH questions. Listen to these questions. Why not? What is wrong? What do you mean? Why can't you come to work today? When did you start feeling sick? Now you try it. Why are you learning English? When English speakers ask a question that begins with DO, IS, and CAN, their voice goes up at the end of the question. These are called yes-no questions, because you can answer them with one word. Listen to the doctor's question. Do you have a sore throat? Yes, I have a sore throat. Now you try it. Do you like Voice of America?