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