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