1 Is there a picture on the wall?
What is there on the wall?
There is a picture on the wall,isn`t there?
2
Does the lecture begin at nine o'clock?
When does the lecture begin?
The lecture begins at nine o'clock,doesn`t it?
3
Has he bought a ticket yet?
What has he bought yet?
He has already bought a ticket,hasn`t he?
4
Did I(you) hear about this film from my(your) friend?
What did I(you) hear from my(your) friend about?
I heard about this film from my friend,didn`t I?