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 anteriore
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 anteriore 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
Passato
I'd have stumbled you'd have stumbled he'd have stumbled we'd have stumbled you'd have stumbled they'd have stumbled
Passato 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