I
would have preconditioned
you
would have preconditioned
he / she / it
would have preconditioned
we
would have preconditioned
you
would have preconditioned
they
would have preconditioned
I
would have been preconditioning
you
would have been preconditioning
he / she / it
would have been preconditioning
we
would have been preconditioning
you
would have been preconditioning
they
would have been preconditioning