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