I'll be imitating you'll be imitating he'll be imitating we'll be imitating you'll be imitating they'll be imitating
Future perfect
I'll have imitated you'll have imitated he'll have imitated we'll have imitated you'll have imitated they'll have imitated
Future perfect continuous
I'll have been imitating you'll have been imitating he'll have been imitating we'll have been imitating you'll have been imitating they'll have been imitating
I'd be imitating you'd be imitating he'd be imitating we'd be imitating you'd be imitating they'd be imitating
Past
I'd have imitated you'd have imitated he'd have imitated we'd have imitated you'd have imitated they'd have imitated
Past continuous
I'd have been imitating you'd have been imitating he'd have been imitating we'd have been imitating you'd have been imitating they'd have been imitating