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