Why are there so many ways to say 'last night' in Korean? I don't know which one to use. Do they all meant the same thing? Also, which one is more commonly said? 1. 어제저녁 2. 어젯밤 3. 엊저녁 4. 지난밤 5. 간밤 6. 작야 진짜 많아요! 아이고..