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