I'll be buttering you'll be buttering she'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 she'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 she'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 she'd be buttering we'd be buttering you'd be buttering they'd be buttering
Passato
I'd have buttered you'd have buttered she'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 she'd have been buttering we'd have been buttering you'd have been buttering they'd have been buttering