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