What you (to do) for the last 3 hours?
What have you been doing for the last 3 hours?
We alwys (to live) in this flat?
We have always lived in this flat.
How long (to know) you the truth?
How long have you known the truth?
I'm sorry, we're late. You (wait) long?
Have you been waiting long?
I think John (to forget) my number. I (to expect) his call for the last 2 hours.
I think John has forgotten my number. I have been expecting his call for the last 2 hours.
I am tired. I (to work) for ten hours and I (not to finish) yet.
I have been working for ten hours and I hasn't finished yet.
He (to shop) since morning, he already (to spend) a lot of money.
He has been shopping since morning, he has already spent a lot of money.
My mother (to ask) me about my pocket money a dozen times.
My mother has asked me about my pocket money a dozen times.
