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