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