I'll be shadowing you'll be shadowing he'll be shadowing we'll be shadowing you'll be shadowing they'll be shadowing
Future perfect
I'll have shadowed you'll have shadowed he'll have shadowed we'll have shadowed you'll have shadowed they'll have shadowed
Future perfect continuous
I'll have been shadowing you'll have been shadowing he'll have been shadowing we'll have been shadowing you'll have been shadowing they'll have been shadowing
I'd be shadowing you'd be shadowing he'd be shadowing we'd be shadowing you'd be shadowing they'd be shadowing
Past
I'd have shadowed you'd have shadowed he'd have shadowed we'd have shadowed you'd have shadowed they'd have shadowed
Past continuous
I'd have been shadowing you'd have been shadowing he'd have been shadowing we'd have been shadowing you'd have been shadowing they'd have been shadowing