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 contínuo
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?
Preterito contínuo
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 perfeito
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 perfeito contínuo
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?
Mais perfeito
hadn't I altered? hadn't you altered? hadn't he altered? hadn't we altered? hadn't you altered? hadn't they altered?
Contínuo mais perfeito
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
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 contínuo
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 perfeito
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 perfeito 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 contínuo
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 contínuo
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?