The normal word order for Korean is subject - object - verb.
This sentence means “Young-Shik sees John.”
|Young-Shik (subj)||John (obj)||sees|
The syllables in gray are the markers, which, in technical terms, are called particles. These particles tell us which word is which, so we can also say:
and have the same meaning. Does this mean we can just throw the words up in the air and say them in any order that they happen to land?
No; in the interests of consistency and making communication easier, Korean almost always uses the subject - object - verb order, and the verb always comes at the end of the sentence.