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