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