do I not back? do you not back? does she not back? do we not back? do you not back? do they not back?
Presente contínuo
am I not backing? are you not backing? is she not backing? are we not backing? are you not backing? are they not backing?
Pretérito
did I not back? did you not back? did she not back? did we not back? did you not back? did they not back?
Preterito contínuo
was I not backing? were you not backing? was she not backing? were we not backing? were you not backing? were they not backing?
Presente perfeito
have I not backed? have you not backed? has she not backed? have we not backed? have you not backed? have they not backed?
Presente perfeito contínuo
have I not been backing? have you not been backing? has she not been backing? have we not been backing? have you not been backing? have they not been backing?
Mais perfeito
had I not backed? had you not backed? had she not backed? had we not backed? had you not backed? had they not backed?
Contínuo mais perfeito
had I not been backing? had you not been backing? had she not been backing? had we not been backing? had you not been backing? had they not been backing?
Futuro
will I not back? will you not back? will she not back? will we not back? will you not back? will they not back?
Futuro contínuo
will I not be backing? will you not be backing? will she not be backing? will we not be backing? will you not be backing? will they not be backing?
futuro perfeito
will I not have backed? will you not have backed? will she not have backed? will we not have backed? will you not have backed? will they not have backed?
futuro perfeito contínuo
will I not have been backing? will you not have been backing? will she not have been backing? will we not have been backing? will you not have been backing? will they not have been backing?
Condicional
Presente
would I not back? would you not back? would she not back? would we not back? would you not back? would they not back?
Presente contínuo
would I not be backing? would you not be backing? would she not be backing? would we not be backing? would you not be backing? would they not be backing?
Passado
would I not have backed? would you not have backed? would she not have backed? would we not have backed? would you not have backed? would they not have backed?
Passado contínuo
would I not have been backing? would you not have been backing? would she not have been backing? would we not have been backing? would you not have been backing? would they not have been backing?