don't I biff? don't you biff? doesn't she biff? don't we biff? don't you biff? don't they biff?
Presente continuo
am I not biffing? aren't you biffing? isn't she biffing? aren't we biffing? aren't you biffing? aren't they biffing?
Pretérito
didn't I biff? didn't you biff? didn't she biff? didn't we biff? didn't you biff? didn't they biff?
Pretérito continuo
wasn't I biffing? weren't you biffing? wasn't she biffing? weren't we biffing? weren't you biffing? weren't they biffing?
Presente perfecto
haven't I biffed? haven't you biffed? hasn't she biffed? haven't we biffed? haven't you biffed? haven't they biffed?
Presente perfecto continuo
haven't I been biffing? haven't you been biffing? hasn't she been biffing? haven't we been biffing? haven't you been biffing? haven't they been biffing?
Pluscuamperfecto
hadn't I biffed? hadn't you biffed? hadn't she biffed? hadn't we biffed? hadn't you biffed? hadn't they biffed?
Pluscuamperfecto continuo
hadn't I been biffing? hadn't you been biffing? hadn't she been biffing? hadn't we been biffing? hadn't you been biffing? hadn't they been biffing?
Futuro simple
won't I biff? won't you biff? won't she biff? won't we biff? won't you biff? won't they biff?
Futuro continuo
won't I be biffing? won't you be biffing? won't she be biffing? won't we be biffing? won't you be biffing? won't they be biffing?
Futuro perfecto
won't I have biffed? won't you have biffed? won't she have biffed? won't we have biffed? won't you have biffed? won't they have biffed?
Futuro perfecto contínuo
won't I have been biffing? won't you have been biffing? won't she have been biffing? won't we have been biffing? won't you have been biffing? won't they have been biffing?
Condicional
Presente
wouldn't I biff? wouldn't you biff? wouldn't she biff? wouldn't we biff? wouldn't you biff? wouldn't they biff?
Presente continuo
wouldn't I be biffing? wouldn't you be biffing? wouldn't she be biffing? wouldn't we be biffing? wouldn't you be biffing? wouldn't they be biffing?
Passado
wouldn't I have biffed? wouldn't you have biffed? wouldn't she have biffed? wouldn't we have biffed? wouldn't you have biffed? wouldn't they have biffed?
Passado continuo
wouldn't I have been biffing? wouldn't you have been biffing? wouldn't she have been biffing? wouldn't we have been biffing? wouldn't you have been biffing? wouldn't they have been biffing?