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