I've been extemporising you've been extemporising she's been extemporising we've been extemporising you've been extemporising they've been extemporising
I'll be extemporising you'll be extemporising she'll be extemporising we'll be extemporising you'll be extemporising they'll be extemporising
Futuro perfecto
I'll have extemporised you'll have extemporised she'll have extemporised we'll have extemporised you'll have extemporised they'll have extemporised
Futuro perfecto contínuo
I'll have been extemporising you'll have been extemporising she'll have been extemporising we'll have been extemporising you'll have been extemporising they'll have been extemporising
I'd be extemporising you'd be extemporising she'd be extemporising we'd be extemporising you'd be extemporising they'd be extemporising
Passado
I'd have extemporised you'd have extemporised she'd have extemporised we'd have extemporised you'd have extemporised they'd have extemporised
Passado continuo
I'd have been extemporising you'd have been extemporising she'd have been extemporising we'd have been extemporising you'd have been extemporising they'd have been extemporising