I
would have quintuplicated
you
would have quintuplicated
he / she / it
would have quintuplicated
we
would have quintuplicated
you
would have quintuplicated
they
would have quintuplicated
I
would have been quintuplicating
you
would have been quintuplicating
he / she / it
would have been quintuplicating
we
would have been quintuplicating
you
would have been quintuplicating
they
would have been quintuplicating