I've been underachieving you've been underachieving he's been underachieving we've been underachieving you've been underachieving they've been underachieving
I'd been underachieving you'd been underachieving he'd been underachieving we'd been underachieving you'd been underachieving they'd been underachieving
I'll be underachieving you'll be underachieving he'll be underachieving we'll be underachieving you'll be underachieving they'll be underachieving
Futuro perfecto
I'll have underachieved you'll have underachieved he'll have underachieved we'll have underachieved you'll have underachieved they'll have underachieved
Futuro perfecto contínuo
I'll have been underachieving you'll have been underachieving he'll have been underachieving we'll have been underachieving you'll have been underachieving they'll have been underachieving
I'd be underachieving you'd be underachieving he'd be underachieving we'd be underachieving you'd be underachieving they'd be underachieving
Passado
I'd have underachieved you'd have underachieved he'd have underachieved we'd have underachieved you'd have underachieved they'd have underachieved
Passado continuo
I'd have been underachieving you'd have been underachieving he'd have been underachieving we'd have been underachieving you'd have been underachieving they'd have been underachieving