1 I haven't listened to their new CD yet Is it any good?
2 We've been waiting for you for over an hour. Where have you been?
3 Have you ever been to the UK before?
4 I'm afraid we've already made plans for this weekend, so we won't be free.
5 Pedro has been having English lessons since he was five years old.
6 It's strange that you mention the film Crash. I've just been reading about it in the paper.
7 I've never heard of a ‘sudoku'. What is it?