I'll be bethinking you'll be bethinking he'll be bethinking we'll be bethinking you'll be bethinking they'll be bethinking
Future perfect
I'll have bethought you'll have bethought he'll have bethought we'll have bethought you'll have bethought they'll have bethought
Future perfect continuous
I'll have been bethinking you'll have been bethinking he'll have been bethinking we'll have been bethinking you'll have been bethinking they'll have been bethinking
I'd be bethinking you'd be bethinking he'd be bethinking we'd be bethinking you'd be bethinking they'd be bethinking
Past
I'd have bethought you'd have bethought he'd have bethought we'd have bethought you'd have bethought they'd have bethought
Past continuous
I'd have been bethinking you'd have been bethinking he'd have been bethinking we'd have been bethinking you'd have been bethinking they'd have been bethinking