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