buy
bought
She / be / Africa
She's been to Africa.
They / make / a mistake
They haven't made a mistake.
you / ever / call / for an ambulance
Have you ever called for an ambulance?
have
had
They / read / that book / twice
They have read that book twice.
I / buy / anything
I haven't bought anything.
they / ever / find / any money?
Have they ever found any money
go
gone
He / see / an accident
He has seen an accident.
He / cut / his hair
He hasn't cut his hair.
how long / he / be / a teacher?
How long has he been a teacher?
buy
bought
We / watch / the film
We have watched the film.
Our mum / find / the keys
Our mum hasn't found the keys.
How long / they / live / here?
How long have they lived here?
sell
sold
The dog / break / the jar
The dog has broken the jar.
The dog / eat / the bone
The dog hasn't eaten the bone.
she / be / here?
Has she been here?