Come back after 3 years.
Come back in 3 years.
Either would make sense, but 'in' seems more natural to my ear in most situations. There is a very subtle difference in that 'after' suggests three years after someone leaves, and that may not be straight away.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Either would make sense, but 'in' seems more natural to my ear in most situations. There is a very subtle difference in that 'after' suggests three years after someone leaves, and that may not be straight away.