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