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