I _______ have met him a long time ago. Both his name and face are very familiar.

You would have helped your mother do some housework. But you_______.

Though it is the first time they have met, they talked as if they _____ friends for many years.

She＿＿＿＿＿＿＿＿the film. She knows nothing about it. 

--- Have you told him we have changed the plan?I _____ have, but I haven’t done it yet.