I've been double-checking you've been double-checking he's been double-checking we've been double-checking you've been double-checking they've been double-checking
I'd been double-checking you'd been double-checking he'd been double-checking we'd been double-checking you'd been double-checking they'd been double-checking
I'll be double-checking you'll be double-checking he'll be double-checking we'll be double-checking you'll be double-checking they'll be double-checking
Futuro perfecto
I'll have double-checked you'll have double-checked he'll have double-checked we'll have double-checked you'll have double-checked they'll have double-checked
Futuro perfecto contínuo
I'll have been double-checking you'll have been double-checking he'll have been double-checking we'll have been double-checking you'll have been double-checking they'll have been double-checking
I'd be double-checking you'd be double-checking he'd be double-checking we'd be double-checking you'd be double-checking they'd be double-checking
Passado
I'd have double-checked you'd have double-checked he'd have double-checked we'd have double-checked you'd have double-checked they'd have double-checked
Passado continuo
I'd have been double-checking you'd have been double-checking he'd have been double-checking we'd have been double-checking you'd have been double-checking they'd have been double-checking