Perfect
Have you ever been to Canada?
I have just written to her.
I have already done my home work.
She has not seen Mike since they left school.
Mike has come recently.
Perfect Continious
I have been searching for my notebook for two hours before I finally found it.
He has been working for this company for 10 years.
I have been working in the garden.
We have been waiting for him for one hour!
I have been watching TV since 7 o'clock.