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