I
would have immaterialized
you
would have immaterialized
he / she / it
would have immaterialized
we
would have immaterialized
you
would have immaterialized
they
would have immaterialized
I
would have been immaterializing
you
would have been immaterializing
he / she / it
would have been immaterializing
we
would have been immaterializing
you
would have been immaterializing
they
would have been immaterializing