Past Participle
see
seen
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?
We use Has only for singular nouns, like: I, He, She and it
Wrong
put
put
I/buy/anything.
I haven't bought anything.
they/ever/find/any money?
Have they ever found any money
Has the dogs eaten everything?
This question is correct.
Wrong
speak
spoken
He/see/an angel.
He's seen an angel.
He/cut/his hair.
He hasn't cut his hair.
how long/he/be/a teacher?
How long has he been a teacher?
We can´t use "already" in negative sentences.
Right
fly
flown
We/think about/the film.
We've thought about the film.
Our mum/sell/ her new shoes.
Our mum hasn't sold her new shoes
How much/they/steal?
How much have they stolen?
The present perfect can´t be used with the time expression "this year" because it is a definite time expression, and with definite time expressions we use simple past.
WRONG!
ring
rung
the ground/shake/with/the earthquake
The ground has shaken with the earthquake
The dog/bite/the bone.
The dog hasn't bit / bitten the bone.
she/sing/well?
Has she sung well?
Everybody has helped.
The sentence is right.
Correct!!