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