I
would have restrengthened
you
would have restrengthened
he / she / it
would have restrengthened
we
would have restrengthened
you
would have restrengthened
they
would have restrengthened
I
would have been restrengthening
you
would have been restrengthening
he / she / it
would have been restrengthening
we
would have been restrengthening
you
would have been restrengthening
they
would have been restrengthening