His aunt (be) to london many times . when l entered the kitchen my mother (cook) supper. l (not see) for ages .

His aunt has been to London many times. — Has his aunt been to London many times? His aunt has not been to London many times.

When I entered the kitchen my mother was cooking supper. — Was my mother cooking supper when I entered the kitchen? When I entered the kitchen my mother was not cooking supper.

I have not seen you for ages. — Haven’t I seen you for ages?