Earlier quoted context omitted.
Korean has a crapload of complex speech patterns (degree of politeness - that's sheer madness) but the nice(?) thing about it is that it all comes at the end. So you can start your sentence without even deciding if it's a statement or a question. E.g., 오늘 그 식당 열어요 Today that restaurant is open. 오늘 그 식당 열어요? Is that restaurant open today? 오늘 그 식당 열 것 같아요. I guess that restaurant is open today. 오늘 그 식당 열 것 같다고 들었어요. I…
Is there the Korean equivalent of very formal language, such as: "Dear honoured sir, may I humbly beg for your indulgence in a meagre glass of beer?"
Your relationship to who you're speaking to (and who you are referring to if you speak about anyone else) changes the grammar of the sentence.
The grammar changes mostly manifest in different suffix endings.