see
seen
I /go/to London
I have gone to London
I /swim/ in the ocean
I haven't swum in the ocean
You /fly a plane?
Have you flown a plane?
make
made
You/be/to Paris
You have been to Paris
We/not drink/ hot chocolate
We haven't drunk hot chocolate
he/write/ a letter?
has he written a letter?
be
been
They/buy/a new car
They have bought a new car
He/ not go/ scuba diving
He hasn't gone scuba diving
They/ ride a horse?
Have they ridden a horse?
eat
eaten
She/ see/ a ghost
She has seen a ghost
They/ never/meet /a famous person
They have never met a famous person
He/ever/be/ to the UK?
Has he ever been to the UK?
fly
flown
He /break/ a leg
He has broken a leg
She/ never/go camping
She has never gone camping
you/ ever/win/ a competition
have you ever won a competition?