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