Past Participle
see
seen
I haven't never studied French.
I have never studied French.
have
had
they/ever/find/any money?
Have they ever found any money?
Have you never played baseball?
Incorrect.
Have you ever played baseball?
go
gone
I have already eaten.
Correct.
buy
bought
She hasn't already been to Italy.
Incorrect.
She hasn't been to Italy yet.
She has already been to Italy.
The dog/eat/the bone.
The dog hasn't eaten the bone.
I haven't celebrated Christmas yet.
Correct.