I
would have counterstained
you
would have counterstained
he / she / it
would have counterstained
we
would have counterstained
you
would have counterstained
they
would have counterstained
I
would have been counterstaining
you
would have been counterstaining
he / she / it
would have been counterstaining
we
would have been counterstaining
you
would have been counterstaining
they
would have been counterstaining