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