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