So I'm undertaking the task of learning how to count things correctly in Korean. I noticed there are several suffixes that cannot stand alone and need to always be paired with either a number or the "how many" question word "몇". I've discovered some serious challenges in learning the counting and number system and some questions came up that my Korean friends who are native speakers had trouble answering. 1. What is the difference between the following three words, other than the fact that one uses native korean numbers and the other two use sino-korean numbers? Why would a native speaker choose 다섯달 instead of saying 오개월 and vice-versa? sino-korean month counter -월 sino-korean period of months counter -개월 native korean period of months counter -달 At the moment, the way I'm thinking about this is that 오개월 and 다섯달 are two ways of saying the same thing, which would somewhat translate to "a period of five months long" or something like that, is this accurate? For 오월 I get that it's used to say what essentially translates to May...right? 2. If "주" is "week", what is 주간 or 주일? Are these able to be used as standalone nouns or are they always unique suffixes? Why can't I just say "오주" ? Are 주일 like weekdays?, like "오주일" ? What is the difference? 3. When using ordinal numbers (first, twelfth, forty-second, ninth, etc), is it more standard to use -째 or -번째? 5. Bonus question that has nothing to do with this subject, anyone able to explain the difference between "liking" and "doing liking" in korean? My friend always corrects me when I say things like 나는 개를 좋아요! she says I should say: 나는 개를 좋아해요. Both are correct right? What's the difference? Thanks everyone !!! :) 정말 감사합니다!