Lain's answer is quite correct.^^ 나는(a topic with the topic marker '는') + 니가(a subject with the subject marker '가') + 필요해(a descriptive verb - 필요하다) (Korean adjectives are often called "descriptive verb" because they exactly act like verbs meaning they can be the predicate in a sentence without "be verb") Literally it should be "나는(topic) 당신을(object) 필요로 합니다" but "나는 니가 필요해" or "저는 당신이 필요해요" would be more natural in casual conversation. @Jake, we also count "나는" as a subject but in terms of grammar, we call it "a topic" with topic markers "은/는" so that, in a sentence there could be "a topic, a subject, an object or a verb/adjective". Also if topics or subjects are very clear out of contexts, they are often omitted. As a result, the above sentences can be "(나는) 니가 필요해","(저는) 당신을 필요로 합니다", or "(저는) 당신이 필요해요" ^^ -------------------------------------- Additional information. @Jake Don't need to be confused.^^ You are right. "니가" has to be "an object" like you said, "널(너를)". In most cases, transitive verbs are translated as "~을/를+ verbs" I think it's because of the verb "to need sth". "To need sth" can be translated in two ways in Korean. 1) A 을 필요로 하다.(A can be an object) 2) A 가 필요하다.(even if "to need" is a transitive verb) For example, I need a car : (나는+) 차가+필요해요. 나는 차를 필요해요(sounds quite weird) I need a girlfriend : (나는+) 여자친구가 필요해요. 나는 여자친구를 필요해요(sounds odd) I need some work out : (나는+) 운동이 필요해요. To sum up, There are two usages of subject markers "이/가" 1) They make a noun into a subject 2) They has the sense of "none other than" or "nothing but" I need : 난 필요해. what?(=what do you need?) 무엇이?? (none more than)You : 다름아닌 "니가" so that, 난 니가 필요해.(= I don't need others, only need you) I need : 난 필요해. what?(=what do you need?) : 무엇이?? (none more than) a car : 다름아닌 "차가" so that, 난 차가 필요해. I think you need to explore the second usage of "이/가" more.^^ ^_______^

I'm happy that many are trying to teach me.. Thank you very much! But, sadly i can't understand it cause i don't know how to read Hangul yet >.<

i am pretty sure that is correct :) but let's wait for a native korean to check it out.

Can a native korean verify Lain's comment. If they are correct, why are two subjects used?

나는 니가 필요해.