don't I check? don't you check? doesn't he check? don't we check? don't you check? don't they check?
Presente continuo
am I not checking? aren't you checking? isn't he checking? aren't we checking? aren't you checking? aren't they checking?
Pretérito
didn't I check? didn't you check? didn't he check? didn't we check? didn't you check? didn't they check?
Pretérito continuo
wasn't I checking? weren't you checking? wasn't he checking? weren't we checking? weren't you checking? weren't they checking?
Presente perfecto
haven't I checked? haven't you checked? hasn't he checked? haven't we checked? haven't you checked? haven't they checked?
Presente perfecto continuo
haven't I been checking? haven't you been checking? hasn't he been checking? haven't we been checking? haven't you been checking? haven't they been checking?
Pluscuamperfecto
hadn't I checked? hadn't you checked? hadn't he checked? hadn't we checked? hadn't you checked? hadn't they checked?
Pluscuamperfecto continuo
hadn't I been checking? hadn't you been checking? hadn't he been checking? hadn't we been checking? hadn't you been checking? hadn't they been checking?
Futuro simple
won't I check? won't you check? won't he check? won't we check? won't you check? won't they check?
Futuro continuo
won't I be checking? won't you be checking? won't he be checking? won't we be checking? won't you be checking? won't they be checking?
Futuro perfecto
won't I have checked? won't you have checked? won't he have checked? won't we have checked? won't you have checked? won't they have checked?
Futuro perfecto contínuo
won't I have been checking? won't you have been checking? won't he have been checking? won't we have been checking? won't you have been checking? won't they have been checking?
Condicional
Presente
wouldn't I check? wouldn't you check? wouldn't he check? wouldn't we check? wouldn't you check? wouldn't they check?
Presente continuo
wouldn't I be checking? wouldn't you be checking? wouldn't he be checking? wouldn't we be checking? wouldn't you be checking? wouldn't they be checking?
Passado
wouldn't I have checked? wouldn't you have checked? wouldn't he have checked? wouldn't we have checked? wouldn't you have checked? wouldn't they have checked?
Passado continuo
wouldn't I have been checking? wouldn't you have been checking? wouldn't he have been checking? wouldn't we have been checking? wouldn't you have been checking? wouldn't they have been checking?