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