From Jonathan Gardner's Korean Notebook
The are several kinds of verb endings.
Non-final verb endings (the most typical kind) are attached to verbs to make new verbs. They cannot, in and of themselves, end a sentence or a clause. See Category:Verb Endings for a list of these.
Final Verb Endings are attached only at the end. They usually convey a sense of time (past, present, future) as well as the type of sentence (statement, question) and also convey Levels of Speech. See Category:Final Verb Endings for a list of these.