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I'd been subspecialising you'd been subspecialising she'd been subspecialising we'd been subspecialising you'd been subspecialising they'd been subspecialising
I'll be subspecialising you'll be subspecialising she'll be subspecialising we'll be subspecialising you'll be subspecialising they'll be subspecialising
Future perfect
I'll have subspecialised you'll have subspecialised she'll have subspecialised we'll have subspecialised you'll have subspecialised they'll have subspecialised
Future perfect continuous
I'll have been subspecialising you'll have been subspecialising she'll have been subspecialising we'll have been subspecialising you'll have been subspecialising they'll have been subspecialising
I'd be subspecialising you'd be subspecialising she'd be subspecialising we'd be subspecialising you'd be subspecialising they'd be subspecialising
Past
I'd have subspecialised you'd have subspecialised she'd have subspecialised we'd have subspecialised you'd have subspecialised they'd have subspecialised
Past continuous
I'd have been subspecialising you'd have been subspecialising she'd have been subspecialising we'd have been subspecialising you'd have been subspecialising they'd have been subspecialising