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