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