They ... (never/see) the Eiffel Tower before.
have never seen
I ... (prepare) for my maths test tonight so don't call me then.
am preparing
She ... (think) about changing her job because she isn't happy about it.
is thinking
This is the second time she ... (do) something like that to me.
has done
This horrible teacher ... (not teach/I) anything so far!
hasn't taught me
I ... (know) this song since I was a child.
have known
(You/ever/meet) anybody really famous?
Have you ever met
She ... (be) to the bank to pay some bills. She'll be back in an hour.
has gone
