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