Wh Questions

Wh questions (= question-word questions, special questions) are those that are formed with a question word such as who, what, which , when, where, why, how. They ask for more specific answer than just 'yes' or 'no'.

Where's my knife?
Why are you complaining?
How did it get broken?
The default tone for why questions is a fall. As with statements , this tone meaning is the definitive fall:
Where's the grater?
How do you spell friend?
So who did you see?
What does intestate mean?
What books have you read recently?
Nevertheless, a wh question can also be said with a non-fall: a rise or, less commonly, a fall-rise. This has the effect of making it more gentle, kindly, encouraging, sympathetic or deferential, as opposed to businesslike fall. We call this tone meaning the encouraging rise.
How long will you be staying in London, sir?
How many people in your ⤵⤴party, madam?
Contrast the two tone meanings, definitive fall and encouraging rise:
Why are you angry? (unmarked)
Why are you angry? (interested, sympathetic)
A separate type of wh question is the echo question, discussed in
2.16
below.

A short wh question that the speaker immediately answer himself (one type of rhetorical question) usually has an interested rise:

I'm coming back. || Why? | Because I love you.
We can conquer poverty. || How? | By 'educating the workforce.
🎧
You can't go. || Why not? | Because I say so.