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