I'll be diminishing you'll be diminishing he'll be diminishing we'll be diminishing you'll be diminishing they'll be diminishing
Future perfect
I'll have diminished you'll have diminished he'll have diminished we'll have diminished you'll have diminished they'll have diminished
Future perfect continuous
I'll have been diminishing you'll have been diminishing he'll have been diminishing we'll have been diminishing you'll have been diminishing they'll have been diminishing
I'd be diminishing you'd be diminishing he'd be diminishing we'd be diminishing you'd be diminishing they'd be diminishing
Past
I'd have diminished you'd have diminished he'd have diminished we'd have diminished you'd have diminished they'd have diminished
Past continuous
I'd have been diminishing you'd have been diminishing he'd have been diminishing we'd have been diminishing you'd have been diminishing they'd have been diminishing