don't I doubt? don't you doubt? doesn't he doubt? don't we doubt? don't you doubt? don't they doubt?
Presente contínuo
am I not doubting? aren't you doubting? isn't he doubting? aren't we doubting? aren't you doubting? aren't they doubting?
Pretérito
didn't I doubt? didn't you doubt? didn't he doubt? didn't we doubt? didn't you doubt? didn't they doubt?
Preterito contínuo
wasn't I doubting? weren't you doubting? wasn't he doubting? weren't we doubting? weren't you doubting? weren't they doubting?
Presente perfeito
haven't I doubted? haven't you doubted? hasn't he doubted? haven't we doubted? haven't you doubted? haven't they doubted?
Presente perfeito contínuo
haven't I been doubting? haven't you been doubting? hasn't he been doubting? haven't we been doubting? haven't you been doubting? haven't they been doubting?
Mais perfeito
hadn't I doubted? hadn't you doubted? hadn't he doubted? hadn't we doubted? hadn't you doubted? hadn't they doubted?
Contínuo mais perfeito
hadn't I been doubting? hadn't you been doubting? hadn't he been doubting? hadn't we been doubting? hadn't you been doubting? hadn't they been doubting?
Futuro
won't I doubt? won't you doubt? won't he doubt? won't we doubt? won't you doubt? won't they doubt?
Futuro contínuo
won't I be doubting? won't you be doubting? won't he be doubting? won't we be doubting? won't you be doubting? won't they be doubting?
futuro perfeito
won't I have doubted? won't you have doubted? won't he have doubted? won't we have doubted? won't you have doubted? won't they have doubted?
futuro perfeito contínuo
won't I have been doubting? won't you have been doubting? won't he have been doubting? won't we have been doubting? won't you have been doubting? won't they have been doubting?
Condicional
Presente
wouldn't I doubt? wouldn't you doubt? wouldn't he doubt? wouldn't we doubt? wouldn't you doubt? wouldn't they doubt?
Presente contínuo
wouldn't I be doubting? wouldn't you be doubting? wouldn't he be doubting? wouldn't we be doubting? wouldn't you be doubting? wouldn't they be doubting?
Passado
wouldn't I have doubted? wouldn't you have doubted? wouldn't he have doubted? wouldn't we have doubted? wouldn't you have doubted? wouldn't they have doubted?
Passado contínuo
wouldn't I have been doubting? wouldn't you have been doubting? wouldn't he have been doubting? wouldn't we have been doubting? wouldn't you have been doubting? wouldn't they have been doubting?