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