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