do I not curb? do you not curb? does he not curb? do we not curb? do you not curb? do they not curb?
Presente continuo
am I not curbing? are you not curbing? is he not curbing? are we not curbing? are you not curbing? are they not curbing?
Pretérito
did I not curb? did you not curb? did he not curb? did we not curb? did you not curb? did they not curb?
Pretérito continuo
was I not curbing? were you not curbing? was he not curbing? were we not curbing? were you not curbing? were they not curbing?
Presente perfecto
have I not curbed? have you not curbed? has he not curbed? have we not curbed? have you not curbed? have they not curbed?
Presente perfecto continuo
have I not been curbing? have you not been curbing? has he not been curbing? have we not been curbing? have you not been curbing? have they not been curbing?
Pluscuamperfecto
had I not curbed? had you not curbed? had he not curbed? had we not curbed? had you not curbed? had they not curbed?
Pluscuamperfecto continuo
had I not been curbing? had you not been curbing? had he not been curbing? had we not been curbing? had you not been curbing? had they not been curbing?
Futuro simple
will I not curb? will you not curb? will he not curb? will we not curb? will you not curb? will they not curb?
Futuro continuo
will I not be curbing? will you not be curbing? will he not be curbing? will we not be curbing? will you not be curbing? will they not be curbing?
Futuro perfecto
will I not have curbed? will you not have curbed? will he not have curbed? will we not have curbed? will you not have curbed? will they not have curbed?
Futuro perfecto contínuo
will I not have been curbing? will you not have been curbing? will he not have been curbing? will we not have been curbing? will you not have been curbing? will they not have been curbing?
Condicional
Presente
would I not curb? would you not curb? would he not curb? would we not curb? would you not curb? would they not curb?
Presente continuo
would I not be curbing? would you not be curbing? would he not be curbing? would we not be curbing? would you not be curbing? would they not be curbing?
Passado
would I not have curbed? would you not have curbed? would he not have curbed? would we not have curbed? would you not have curbed? would they not have curbed?
Passado continuo
would I not have been curbing? would you not have been curbing? would he not have been curbing? would we not have been curbing? would you not have been curbing? would they not have been curbing?