I'll be weakening you'll be weakening he'll be weakening we'll be weakening you'll be weakening they'll be weakening
Future perfect
I'll have weakened you'll have weakened he'll have weakened we'll have weakened you'll have weakened they'll have weakened
Future perfect continuous
I'll have been weakening you'll have been weakening he'll have been weakening we'll have been weakening you'll have been weakening they'll have been weakening
I'd be weakening you'd be weakening he'd be weakening we'd be weakening you'd be weakening they'd be weakening
Past
I'd have weakened you'd have weakened he'd have weakened we'd have weakened you'd have weakened they'd have weakened
Past continuous
I'd have been weakening you'd have been weakening he'd have been weakening we'd have been weakening you'd have been weakening they'd have been weakening