1) He receives a
net profit. – Does he receive a net profit? He receives a net profit, doesn`t
he? Does he receive a net profit or a gross profit? What does he receive?
2) I
don`t use the Internet. – Don`t I use the Internet? I don`t use the Internet,
do I? Don`t I use the Internet or a computer? What don`t I use?
3) We are in
London. – Are we in London? We are in London, aren`t we? Are we in London or
Paris? Where are we?