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