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