I've been externalising you've been externalising she's been externalising we've been externalising you've been externalising they've been externalising
I'll be externalising you'll be externalising she'll be externalising we'll be externalising you'll be externalising they'll be externalising
Future perfect
I'll have externalised you'll have externalised she'll have externalised we'll have externalised you'll have externalised they'll have externalised
Future perfect continuous
I'll have been externalising you'll have been externalising she'll have been externalising we'll have been externalising you'll have been externalising they'll have been externalising
I'd be externalising you'd be externalising she'd be externalising we'd be externalising you'd be externalising they'd be externalising
Past
I'd have externalised you'd have externalised she'd have externalised we'd have externalised you'd have externalised they'd have externalised
Past continuous
I'd have been externalising you'd have been externalising she'd have been externalising we'd have been externalising you'd have been externalising they'd have been externalising