do I not biff? do you not biff? does she not biff? do we not biff? do you not biff? do they not biff?
Presente continuo
am I not biffing? are you not biffing? is she not biffing? are we not biffing? are you not biffing? are they not biffing?
Pretérito
did I not biff? did you not biff? did she not biff? did we not biff? did you not biff? did they not biff?
Pretérito continuo
was I not biffing? were you not biffing? was she not biffing? were we not biffing? were you not biffing? were they not biffing?
Presente perfecto
have I not biffed? have you not biffed? has she not biffed? have we not biffed? have you not biffed? have they not biffed?
Presente perfecto continuo
have I not been biffing? have you not been biffing? has she not been biffing? have we not been biffing? have you not been biffing? have they not been biffing?
Pluscuamperfecto
had I not biffed? had you not biffed? had she not biffed? had we not biffed? had you not biffed? had they not biffed?
Pluscuamperfecto continuo
had I not been biffing? had you not been biffing? had she not been biffing? had we not been biffing? had you not been biffing? had they not been biffing?
Futuro simple
will I not biff? will you not biff? will she not biff? will we not biff? will you not biff? will they not biff?
Futuro continuo
will I not be biffing? will you not be biffing? will she not be biffing? will we not be biffing? will you not be biffing? will they not be biffing?
Futuro perfecto
will I not have biffed? will you not have biffed? will she not have biffed? will we not have biffed? will you not have biffed? will they not have biffed?
Futuro perfecto contínuo
will I not have been biffing? will you not have been biffing? will she not have been biffing? will we not have been biffing? will you not have been biffing? will they not have been biffing?
Condicional
Presente
would I not biff? would you not biff? would she not biff? would we not biff? would you not biff? would they not biff?
Presente continuo
would I not be biffing? would you not be biffing? would she not be biffing? would we not be biffing? would you not be biffing? would they not be biffing?
Passado
would I not have biffed? would you not have biffed? would she not have biffed? would we not have biffed? would you not have biffed? would they not have biffed?
Passado continuo
would I not have been biffing? would you not have been biffing? would she not have been biffing? would we not have been biffing? would you not have been biffing? would they not have been biffing?