I'll be buttering you'll be buttering he'll be buttering we'll be buttering you'll be buttering they'll be buttering
Futur antérieur
I'll have buttered you'll have buttered he'll have buttered we'll have buttered you'll have buttered they'll have buttered
Futur antérieur continu
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
Passé
I'd have buttered you'd have buttered he'd have buttered we'd have buttered you'd have buttered they'd have buttered
Passé continu
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