I'll be keen keening you'll be keen keening he'll be keen keening we'll be keen keening you'll be keen keening they'll be keen keening
Future perfect
I'll have keen keened you'll have keen keened he'll have keen keened we'll have keen keened you'll have keen keened they'll have keen keened
Future perfect continuous
I'll have been keen keening you'll have been keen keening he'll have been keen keening we'll have been keen keening you'll have been keen keening they'll have been keen keening
I'd be keen keening you'd be keen keening he'd be keen keening we'd be keen keening you'd be keen keening they'd be keen keening
Past
I'd have keen keened you'd have keen keened he'd have keen keened we'd have keen keened you'd have keen keened they'd have keen keened
Past continuous
I'd have been keen keening you'd have been keen keening he'd have been keen keening we'd have been keen keening you'd have been keen keening they'd have been keen keening