I am still, and keep struggling with particles. In dutch we have clear rules how to disassemble a sentence into its seperate parts. In no korean textbook, or on any website could I find a decent rule to explain how to find what each word/word structure means. Let me give you an example of what I mean. Example Sentence: "He is doing his homework" subject: Who or what is doing his homework = He so " He" is the subject. To find the accusative the question becomes Who or What is he doing: = his homework So "his homework" is the accusation. if not mistaken this would mean in korean particle grammar. He는 is doing his homework를. does anyone know or can come up with a clear set of defenitions when u need to use 은/는, 이/가, 을/를. expecially the 2 subject particles are a problem.