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