I'll be buttering you'll be buttering he'll be buttering we'll be buttering you'll be buttering they'll be buttering
Futuro anteriore
I'll have buttered you'll have buttered he'll have buttered we'll have buttered you'll have buttered they'll have buttered
Futuro anteriore contínuo
I'll have been buttering you'll have been buttering he'll have been buttering we'll have been buttering you'll have been buttering they'll have been buttering
I'd be buttering you'd be buttering he'd be buttering we'd be buttering you'd be buttering they'd be buttering
Passato
I'd have buttered you'd have buttered he'd have buttered we'd have buttered you'd have buttered they'd have buttered
Passato continuo
I'd have been buttering you'd have been buttering he'd have been buttering we'd have been buttering you'd have been buttering they'd have been buttering