I've been philosophising you've been philosophising he's been philosophising we've been philosophising you've been philosophising they've been philosophising
I'd been philosophising you'd been philosophising he'd been philosophising we'd been philosophising you'd been philosophising they'd been philosophising
I'll be philosophising you'll be philosophising he'll be philosophising we'll be philosophising you'll be philosophising they'll be philosophising
Future perfect
I'll have philosophised you'll have philosophised he'll have philosophised we'll have philosophised you'll have philosophised they'll have philosophised
Future perfect continuous
I'll have been philosophising you'll have been philosophising he'll have been philosophising we'll have been philosophising you'll have been philosophising they'll have been philosophising
I'd be philosophising you'd be philosophising he'd be philosophising we'd be philosophising you'd be philosophising they'd be philosophising
Past
I'd have philosophised you'd have philosophised he'd have philosophised we'd have philosophised you'd have philosophised they'd have philosophised
Past continuous
I'd have been philosophising you'd have been philosophising he'd have been philosophising we'd have been philosophising you'd have been philosophising they'd have been philosophising