do I back? do you back? does he back? do we back? do you back? do they back?
Presente continuo
am I backing? are you backing? is he backing? are we backing? are you backing? are they backing?
Pretérito
did I back? did you back? did he back? did we back? did you back? did they back?
Pretérito continuo
was I backing? were you backing? was he backing? were we backing? were you backing? were they backing?
Presente perfecto
have I backed? have you backed? has he backed? have we backed? have you backed? have they backed?
Presente perfecto continuo
have I been backing? have you been backing? has he been backing? have we been backing? have you been backing? have they been backing?
Pluscuamperfecto
had I backed? had you backed? had he backed? had we backed? had you backed? had they backed?
Pluscuamperfecto continuo
had I been backing? had you been backing? had he been backing? had we been backing? had you been backing? had they been backing?
Futuro simple
will I back? will you back? will he back? will we back? will you back? will they back?
Futuro continuo
will I be backing? will you be backing? will he be backing? will we be backing? will you be backing? will they be backing?
Futuro perfecto
will I have backed? will you have backed? will he have backed? will we have backed? will you have backed? will they have backed?
Futuro perfecto contínuo
will I have been backing? will you have been backing? will he have been backing? will we have been backing? will you have been backing? will they have been backing?
Condicional
Presente
would I back? would you back? would he back? would we back? would you back? would they back?
Presente continuo
would I be backing? would you be backing? would he be backing? would we be backing? would you be backing? would they be backing?
Passado
would I have backed? would you have backed? would he have backed? would we have backed? would you have backed? would they have backed?
Passado continuo
would I have been backing? would you have been backing? would he have been backing? would we have been backing? would you have been backing? would they have been backing?