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