I'll be challenging you'll be challenging she'll be challenging we'll be challenging you'll be challenging they'll be challenging
Future perfect
I'll have challenged you'll have challenged she'll have challenged we'll have challenged you'll have challenged they'll have challenged
Future perfect continuous
I'll have been challenging you'll have been challenging she'll have been challenging we'll have been challenging you'll have been challenging they'll have been challenging
I'd be challenging you'd be challenging she'd be challenging we'd be challenging you'd be challenging they'd be challenging
Past
I'd have challenged you'd have challenged she'd have challenged we'd have challenged you'd have challenged they'd have challenged
Past continuous
I'd have been challenging you'd have been challenging she'd have been challenging we'd have been challenging you'd have been challenging they'd have been challenging