I'll be sniggering you'll be sniggering she'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 she'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 she'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 she'd be sniggering we'd be sniggering you'd be sniggering they'd be sniggering
Passato
I'd have sniggered you'd have sniggered she'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 she'd have been sniggering we'd have been sniggering you'd have been sniggering they'd have been sniggering