No. 11,326 in Korean
김수일이
The term "김수일이" does not appear to have a specific definition in standard Korean. It might be a proper noun, such as a person's name (Kim Soo-il followed by a subject particle).
In a sentence
김수일이 학교에 갑니다.
Kim Soo-il goes to school.
In this sentence, '김수일이' is the subject of the action described by the verb '갑니다', using the subject marker '이'.
나는 김수일이 좋아합니다.
I like Kim Soo-il.
Here, '김수일이' indicates the direct object of affection, where '이' is in conjunction with the verb '좋아합니다'.
어제 김수일이 책을 읽는 것을 보았습니다.
Yesterday, I saw Kim Soo-il reading a book.
In this context, '김수일이' represents the doer of the action in the subordinate clause, taking the subject marker '이'.
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