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