I've been double-tonguing you've been double-tonguing he's been double-tonguing we've been double-tonguing you've been double-tonguing they've been double-tonguing
I'd been double-tonguing you'd been double-tonguing he'd been double-tonguing we'd been double-tonguing you'd been double-tonguing they'd been double-tonguing
I'll be double-tonguing you'll be double-tonguing he'll be double-tonguing we'll be double-tonguing you'll be double-tonguing they'll be double-tonguing
Future perfect
I'll have double-tongued you'll have double-tongued he'll have double-tongued we'll have double-tongued you'll have double-tongued they'll have double-tongued
Future perfect continuous
I'll have been double-tonguing you'll have been double-tonguing he'll have been double-tonguing we'll have been double-tonguing you'll have been double-tonguing they'll have been double-tonguing
I'd be double-tonguing you'd be double-tonguing he'd be double-tonguing we'd be double-tonguing you'd be double-tonguing they'd be double-tonguing
Past
I'd have double-tongued you'd have double-tongued he'd have double-tongued we'd have double-tongued you'd have double-tongued they'd have double-tongued
Past continuous
I'd have been double-tonguing you'd have been double-tonguing he'd have been double-tonguing we'd have been double-tonguing you'd have been double-tonguing they'd have been double-tonguing