don't I alter? don't you alter? doesn't she alter? don't we alter? don't you alter? don't they alter?
Present continuous
am I not altering? aren't you altering? isn't she altering? aren't we altering? aren't you altering? aren't they altering?
Preterite
didn't I alter? didn't you alter? didn't she alter? didn't we alter? didn't you alter? didn't they alter?
Preterite continuous
wasn't I altering? weren't you altering? wasn't she altering? weren't we altering? weren't you altering? weren't they altering?
Present perfect
haven't I altered? haven't you altered? hasn't she altered? haven't we altered? haven't you altered? haven't they altered?
Present perfect continuous
haven't I been altering? haven't you been altering? hasn't she been altering? haven't we been altering? haven't you been altering? haven't they been altering?
Pluperfect
hadn't I altered? hadn't you altered? hadn't she altered? hadn't we altered? hadn't you altered? hadn't they altered?
Pluperfect continuous
hadn't I been altering? hadn't you been altering? hadn't she been altering? hadn't we been altering? hadn't you been altering? hadn't they been altering?
Future
won't I alter? won't you alter? won't she alter? won't we alter? won't you alter? won't they alter?
Future continuous
won't I be altering? won't you be altering? won't she be altering? won't we be altering? won't you be altering? won't they be altering?
Future perfect
won't I have altered? won't you have altered? won't she have altered? won't we have altered? won't you have altered? won't they have altered?
Future perfect continuous
won't I have been altering? won't you have been altering? won't she have been altering? won't we have been altering? won't you have been altering? won't they have been altering?
Conditional
Present
wouldn't I alter? wouldn't you alter? wouldn't she alter? wouldn't we alter? wouldn't you alter? wouldn't they alter?
Present continuous
wouldn't I be altering? wouldn't you be altering? wouldn't she be altering? wouldn't we be altering? wouldn't you be altering? wouldn't they be altering?
Past
wouldn't I have altered? wouldn't you have altered? wouldn't she have altered? wouldn't we have altered? wouldn't you have altered? wouldn't they have altered?
Past continuous
wouldn't I have been altering? wouldn't you have been altering? wouldn't she have been altering? wouldn't we have been altering? wouldn't you have been altering? wouldn't they have been altering?