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