I'll be theorising you'll be theorising he'll be theorising we'll be theorising you'll be theorising they'll be theorising
Future perfect
I'll have theorised you'll have theorised he'll have theorised we'll have theorised you'll have theorised they'll have theorised
Future perfect continuous
I'll have been theorising you'll have been theorising he'll have been theorising we'll have been theorising you'll have been theorising they'll have been theorising
I'd be theorising you'd be theorising he'd be theorising we'd be theorising you'd be theorising they'd be theorising
Past
I'd have theorised you'd have theorised he'd have theorised we'd have theorised you'd have theorised they'd have theorised
Past continuous
I'd have been theorising you'd have been theorising he'd have been theorising we'd have been theorising you'd have been theorising they'd have been theorising