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