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