I
would have preconstructed
you
would have preconstructed
he / she / it
would have preconstructed
we
would have preconstructed
you
would have preconstructed
they
would have preconstructed
I
would have been preconstructing
you
would have been preconstructing
he / she / it
would have been preconstructing
we
would have been preconstructing
you
would have been preconstructing
they
would have been preconstructing