I
would have subspecialized
you
would have subspecialized
he / she / it
would have subspecialized
we
would have subspecialized
you
would have subspecialized
they
would have subspecialized
I
would have been subspecializing
you
would have been subspecializing
he / she / it
would have been subspecializing
we
would have been subspecializing
you
would have been subspecializing
they
would have been subspecializing