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