18.1 have/has+az első mondat igéjének 3. alakja.
have been
has been
have lived
has worked
has had
have learnt

18.2
have they been in Brazil?
have you known her?
How long has she been learning Italian?
How long has he lived there?
How long have you been a teacher?
How long has it been raining?

18.3
has lived in Wales all her life.
have been on a holiday since Sunday.
has been shining all day.
has been waiting for ten minutes.
has had a beard since he was 20.

18.4 Szerintem ezek a jól:
know
have known
have you been
works
has been
have you lived
I've had
is; has been