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