I'll be stiffering you'll be stiffering he'll be stiffering we'll be stiffering you'll be stiffering they'll be stiffering
Futur antérieur
I'll have stiffered you'll have stiffered he'll have stiffered we'll have stiffered you'll have stiffered they'll have stiffered
Futur antérieur continu
I'll have been stiffering you'll have been stiffering he'll have been stiffering we'll have been stiffering you'll have been stiffering they'll have been stiffering
I'd be stiffering you'd be stiffering he'd be stiffering we'd be stiffering you'd be stiffering they'd be stiffering
Passé
I'd have stiffered you'd have stiffered he'd have stiffered we'd have stiffered you'd have stiffered they'd have stiffered
Passé continu
I'd have been stiffering you'd have been stiffering he'd have been stiffering we'd have been stiffering you'd have been stiffering they'd have been stiffering