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