I'll be besieging you'll be besieging he'll be besieging we'll be besieging you'll be besieging they'll be besieging
Future perfect
I'll have besieged you'll have besieged he'll have besieged we'll have besieged you'll have besieged they'll have besieged
Future perfect continuous
I'll have been besieging you'll have been besieging he'll have been besieging we'll have been besieging you'll have been besieging they'll have been besieging
I'd be besieging you'd be besieging he'd be besieging we'd be besieging you'd be besieging they'd be besieging
Past
I'd have besieged you'd have besieged he'd have besieged we'd have besieged you'd have besieged they'd have besieged
Past continuous
I'd have been besieging you'd have been besieging he'd have been besieging we'd have been besieging you'd have been besieging they'd have been besieging