don't I shift? don't you shift? doesn't he 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 he shifting? aren't we shifting? aren't you shifting? aren't they shifting?
Preterite
didn't I shift? didn't you shift? didn't he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he have been shifting? wouldn't we have been shifting? wouldn't you have been shifting? wouldn't they have been shifting?