don't I biff? don't you biff? doesn't he biff? don't we biff? don't you biff? don't they biff?
Presente contínuo
am I not biffing? aren't you biffing? isn't he biffing? aren't we biffing? aren't you biffing? aren't they biffing?
Pretérito
didn't I biff? didn't you biff? didn't he biff? didn't we biff? didn't you biff? didn't they biff?
Preterito contínuo
wasn't I biffing? weren't you biffing? wasn't he biffing? weren't we biffing? weren't you biffing? weren't they biffing?
Presente perfeito
haven't I biffed? haven't you biffed? hasn't he biffed? haven't we biffed? haven't you biffed? haven't they biffed?
Presente perfeito contínuo
haven't I been biffing? haven't you been biffing? hasn't he been biffing? haven't we been biffing? haven't you been biffing? haven't they been biffing?
Mais perfeito
hadn't I biffed? hadn't you biffed? hadn't he biffed? hadn't we biffed? hadn't you biffed? hadn't they biffed?
Contínuo mais perfeito
hadn't I been biffing? hadn't you been biffing? hadn't he been biffing? hadn't we been biffing? hadn't you been biffing? hadn't they been biffing?
Futuro
won't I biff? won't you biff? won't he biff? won't we biff? won't you biff? won't they biff?
Futuro contínuo
won't I be biffing? won't you be biffing? won't he be biffing? won't we be biffing? won't you be biffing? won't they be biffing?
futuro perfeito
won't I have biffed? won't you have biffed? won't he have biffed? won't we have biffed? won't you have biffed? won't they have biffed?
futuro perfeito contínuo
won't I have been biffing? won't you have been biffing? won't he 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 he biff? wouldn't we biff? wouldn't you biff? wouldn't they biff?
Presente contínuo
wouldn't I be biffing? wouldn't you be biffing? wouldn't he 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 he have biffed? wouldn't we have biffed? wouldn't you have biffed? wouldn't they have biffed?
Passado contínuo
wouldn't I have been biffing? wouldn't you have been biffing? wouldn't he have been biffing? wouldn't we have been biffing? wouldn't you have been biffing? wouldn't they have been biffing?