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