I'll be fluttering you'll be fluttering he'll be fluttering we'll be fluttering you'll be fluttering they'll be fluttering
Future perfect
I'll have fluttered you'll have fluttered he'll have fluttered we'll have fluttered you'll have fluttered they'll have fluttered
Future perfect continuous
I'll have been fluttering you'll have been fluttering he'll have been fluttering we'll have been fluttering you'll have been fluttering they'll have been fluttering
I'd be fluttering you'd be fluttering he'd be fluttering we'd be fluttering you'd be fluttering they'd be fluttering
Past
I'd have fluttered you'd have fluttered he'd have fluttered we'd have fluttered you'd have fluttered they'd have fluttered
Past continuous
I'd have been fluttering you'd have been fluttering he'd have been fluttering we'd have been fluttering you'd have been fluttering they'd have been fluttering