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