I'll be descending you'll be descending he'll be descending we'll be descending you'll be descending they'll be descending
Future perfect
I'll have descended you'll have descended he'll have descended we'll have descended you'll have descended they'll have descended
Future perfect continuous
I'll have been descending you'll have been descending he'll have been descending we'll have been descending you'll have been descending they'll have been descending
I'd be descending you'd be descending he'd be descending we'd be descending you'd be descending they'd be descending
Past
I'd have descended you'd have descended he'd have descended we'd have descended you'd have descended they'd have descended
Past continuous
I'd have been descending you'd have been descending he'd have been descending we'd have been descending you'd have been descending they'd have been descending