1. Questions beginning with what, when, where, which, who, whom, whose, why and how often have a falling tone on an important word (often near the end of the question).
2. However, if the speaker is checking that he or she has heard something correctly, is very surprised at some information that they have just heard, forming a series, as if in a questionnaire, or implying a mild reproach the question may start rising on the wh word and continue to rise throughout (Low Rise)
`How `old are you?
`Where do you `study `English?
`What’s the `matter?
`What have you `done?