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