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