먼저 왜 부탁을 하는지 정확하게 이야기하고, 상대에게 무슨 일을 어떻게 도와주면 되는지 잘 설명해야 한다. = (먼저) [왜 부탁을 하는지] (정확하게) 이야기하고, (상대에게) [무슨 일을 어떻게 도와주면 되는지] (잘) 설명해야 한다. * () = adverbs; [] = noun clauses capturing a question. => First you must state clearly why you are asking a favor, then explain to the person exactly what you want them to do for you, and how. - 먼저 = first. - 왜(why) 부탁을(favor) 하는지(do = ask) = why you are asking a favor. - 상대(the other person)에게(to) = to the other person. - 무슨 일(what matter)을 어떻게(how) 도와주면(if they help you) 되는지(it suffices) = with what and how they should help you. - 잘 설명해야 한다 = must/should explain (it) fully. Important grammar forms: * -지 말하다/알다/설명하다 = say/know/explain if/whether/why/how/etc. (-지 captures a question as a noun clause) * -면 된다 (도와주면 된다) = if you do something, it will suffice => all you need to do is (do something). * -야 한다/된다 (설명해야 한다) = (you) must/should do something (to fulfill a requirement or expectation).