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