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