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