I'll be prolonging you'll be prolonging he'll be prolonging we'll be prolonging you'll be prolonging they'll be prolonging
Future perfect
I'll have prolonged you'll have prolonged he'll have prolonged we'll have prolonged you'll have prolonged they'll have prolonged
Future perfect continuous
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
Past
I'd have prolonged you'd have prolonged he'd have prolonged we'd have prolonged you'd have prolonged they'd have prolonged
Past continuous
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