LEARN KOREAN (한국어) [GRAMMAR] #1

SINCE: ~ㄴ/은 이래로

The word "since" in Korean (이래로) can be used in place of "후" in ~ㄴ/은 후에 to have the meaning of "since I...":

한국에 온 이래로 한국어를 배우고 있어요 - Since coming to Korea, I have been learning Korean
열심히 공부한 이래로 실력은 빨리 늘었어요 - Since studying hard, my skills have been quickly increasing

Those two sentences are perfectly correct, but you should know that Korean people rarely use the word 이래로. You can use it, and everybody will understand what you mean (they will probably be impressed because 이래로 is a difficult word). Instead, it is more common for Korean people to use ~ㄴ/은 후에 to have the meaning of "since." For example:

한국에 온 이래로 한국어를 배우고 있어요.. is better said like this:
한국에 온 후에 한국어를 배우고 있어요 - After coming to Korea, I have been learning Korean

열심히 공부한 이래로 실력은 빨리 늘었어요... is better said like this:
열심히 공부한 후에 실력은 빨리 늘었어요 - After studying hard, my skills have been quickly increasing