I've been extemporizing you've been extemporizing he's been extemporizing we've been extemporizing you've been extemporizing they've been extemporizing
I'll be extemporizing you'll be extemporizing he'll be extemporizing we'll be extemporizing you'll be extemporizing they'll be extemporizing
Futuro perfecto
I'll have extemporized you'll have extemporized he'll have extemporized we'll have extemporized you'll have extemporized they'll have extemporized
Futuro perfecto contínuo
I'll have been extemporizing you'll have been extemporizing he'll have been extemporizing we'll have been extemporizing you'll have been extemporizing they'll have been extemporizing
I'd be extemporizing you'd be extemporizing he'd be extemporizing we'd be extemporizing you'd be extemporizing they'd be extemporizing
Passado
I'd have extemporized you'd have extemporized he'd have extemporized we'd have extemporized you'd have extemporized they'd have extemporized
Passado continuo
I'd have been extemporizing you'd have been extemporizing he'd have been extemporizing we'd have been extemporizing you'd have been extemporizing they'd have been extemporizing