I'll be stumbling you'll be stumbling he'll be stumbling we'll be stumbling you'll be stumbling they'll be stumbling
Futuro perfecto
I'll have stumbled you'll have stumbled he'll have stumbled we'll have stumbled you'll have stumbled they'll have stumbled
Futuro perfecto contínuo
I'll have been stumbling you'll have been stumbling he'll have been stumbling we'll have been stumbling you'll have been stumbling they'll have been stumbling
I'd be stumbling you'd be stumbling he'd be stumbling we'd be stumbling you'd be stumbling they'd be stumbling
Passado
I'd have stumbled you'd have stumbled he'd have stumbled we'd have stumbled you'd have stumbled they'd have stumbled
Passado continuo
I'd have been stumbling you'd have been stumbling he'd have been stumbling we'd have been stumbling you'd have been stumbling they'd have been stumbling