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