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