I
would have underlied, underlain
you
would have underlied, underlain
he / she / it
would have underlied, underlain
we
would have underlied, underlain
you
would have underlied, underlain
they
would have underlied, underlain
I
would have been underlying
you
would have been underlying
he / she / it
would have been underlying
we
would have been underlying
you
would have been underlying
they
would have been underlying