I understand your confusion. There are some rules for reading numbers, but also many exceptions. : ( Mostly before "hour" we use the native Korean numbers as in 1시 = 한 시, but before " second" we use the sino Korean numbers as in 30분=삼십 분. As for 24 hours, we use both 이십사 시간 or 스물네 시간. I guess 이십사시간 is more common. ^^

해주니깐 = 해주니까는 --> 해주니까+는 이걸 = 이것을 지금 바쁘니까 나중에 전화할게 --> I am busy now, so I'll call later. To explain your phrase 해주니깐 이걸, why don't you give some situation or context?

"2년 = 이년" Korean people never say '두년'. ^^

갖다 is the abbreviation of 가지다.

영화 본 후에 피자를 먹고 싶어요. After watching a movie, I'd like to have some pizza. 영화도 보고 피자도 먹고 싶어요. I'd like to watch a movie and have some pizza.

한글(Hangeul, The Korean Alphabet) is composed of 19 consonants(자음) and 21 vowels(모음).

이/가 - subject case marker 을/를 - object case marker 은/는 - semantic marker (adding some special meanings to the noun phrase). It represents "topic or contrast." 은/는 sometimes is found in the location of the subject, that's why some people are confused. I suggest you should read many sentences in the context to get the difference. ^^

I learned two new vocabulary words and I'm confused about them: A. 옷을 세탁소에 맡기다 to leave clothes at the dry cleaner's B. 세탁소에서 옷을 찾다 to pick up the dry cleaning 1. I'm confused about the sentence structure. I thought basic Korean sentence structure is: Subject - Noun - Object - Verb * Korean’s basic word order: Subject(is composed of noun or noun phrase)+Object(is composed of noun or noun phrase)+Verb * Korean has so called case markers like 이/가, 을/를, which means ‘WORD ORDER’ is relatively free. * Case markers show the role of a word or phrase in the sentence. *So, 옷을(objet) 세탁소에(adverbial phrase) 맡기다. = 세탁소에 옷을 맡기다. 제는 옷을 세탁소에 맡겼어요. (I left the clothes at the dry cleaner's.) -->저는 2. I read many explanations about 에 vs 에세.--> 에서 에: used to indicate the destination of a verb (used with directional verbs) 에서: used to indicate the location of an action * ‘맡기다’ needs ‘-에’ and ‘찾다’ usually is used with ‘-에서’ 유치원에 아이를 맡기다. 은행에서 돈을 찾다. So shouldn't it be 세탁소에 옷을 찾다? -->wrong *I guess verbs have strong power in the sentence not only in Korean but also in English. ^^