don't I sign? don't you sign? doesn't he 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 he signing? aren't we signing? aren't you signing? aren't they signing?
Preterite
didn't I sign? didn't you sign? didn't he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he have been signing? wouldn't we have been signing? wouldn't you have been signing? wouldn't they have been signing?