I'll be prolonging you'll be prolonging he'll be prolonging we'll be prolonging you'll be prolonging they'll be prolonging
Futuro anteriore
I'll have prolonged you'll have prolonged he'll have prolonged we'll have prolonged you'll have prolonged they'll have prolonged
Futuro anteriore contínuo
I'll have been prolonging you'll have been prolonging he'll have been prolonging we'll have been prolonging you'll have been prolonging they'll have been prolonging
I'd be prolonging you'd be prolonging he'd be prolonging we'd be prolonging you'd be prolonging they'd be prolonging
Passato
I'd have prolonged you'd have prolonged he'd have prolonged we'd have prolonged you'd have prolonged they'd have prolonged
Passato continuo
I'd have been prolonging you'd have been prolonging he'd have been prolonging we'd have been prolonging you'd have been prolonging they'd have been prolonging