I've been supplementing you've been supplementing he's been supplementing we've been supplementing you've been supplementing they've been supplementing
I'll be supplementing you'll be supplementing he'll be supplementing we'll be supplementing you'll be supplementing they'll be supplementing
Future perfect
I'll have supplemented you'll have supplemented he'll have supplemented we'll have supplemented you'll have supplemented they'll have supplemented
Future perfect continuous
I'll have been supplementing you'll have been supplementing he'll have been supplementing we'll have been supplementing you'll have been supplementing they'll have been supplementing
I'd be supplementing you'd be supplementing he'd be supplementing we'd be supplementing you'd be supplementing they'd be supplementing
Past
I'd have supplemented you'd have supplemented he'd have supplemented we'd have supplemented you'd have supplemented they'd have supplemented
Past continuous
I'd have been supplementing you'd have been supplementing he'd have been supplementing we'd have been supplementing you'd have been supplementing they'd have been supplementing