I've been pitterpattering you've been pitterpattering he's been pitterpattering we've been pitterpattering you've been pitterpattering they've been pitterpattering
I'd been pitterpattering you'd been pitterpattering he'd been pitterpattering we'd been pitterpattering you'd been pitterpattering they'd been pitterpattering
I'll be pitterpattering you'll be pitterpattering he'll be pitterpattering we'll be pitterpattering you'll be pitterpattering they'll be pitterpattering
Future perfect
I'll have pitterpattered you'll have pitterpattered he'll have pitterpattered we'll have pitterpattered you'll have pitterpattered they'll have pitterpattered
Future perfect continuous
I'll have been pitterpattering you'll have been pitterpattering he'll have been pitterpattering we'll have been pitterpattering you'll have been pitterpattering they'll have been pitterpattering
I'd be pitterpattering you'd be pitterpattering he'd be pitterpattering we'd be pitterpattering you'd be pitterpattering they'd be pitterpattering
Past
I'd have pitterpattered you'd have pitterpattered he'd have pitterpattered we'd have pitterpattered you'd have pitterpattered they'd have pitterpattered
Past continuous
I'd have been pitterpattering you'd have been pitterpattering he'd have been pitterpattering we'd have been pitterpattering you'd have been pitterpattering they'd have been pitterpattering