Everything in Korean attaches to the end of a word and the order of the attachments is fixed. A verb takes its stem, then an honorific marker if one is wanted, then tense, then the speech level, then the ending that closes the sentence, and each of those is a separate piece with its own meaning. A single verb can be carrying five decisions at once, in a fixed order, which is why the same verb looks so different from one sentence to the next.
Once you can see the joints, the hundreds of grammar points in a textbook turn out to be combinations of a much smaller set of parts. Learning the parts is a different job from learning the list, and it is a much shorter one.
Six patterns that carry the grammar
- 저는 밥을 먹어요, I eat rice, in the order I as for, rice object, eat. Particles attach directly to nouns and the verb sits at the end.
- 은/는 and 이/가, topic and subject, the same distinction Japanese makes and equally absent from English. Which of the pair you use depends on the last letter of the noun.
- 을/를 marks the object, again choosing its form by whether the noun ends in a consonant or a vowel.
- -고 joins clauses, the ordinary and, attached to the verb stem rather than placed between clauses.
- -아서 gives a reason, meaning so or because, and it also expresses sequence, which is a distinction learners have to feel rather than derive.
- -(으)면 is if, with the vowel inserted only when the stem ends in a consonant. Almost every Korean ending works this way, which makes the pattern worth internalising once.
The pieces, and the order they go in
The stem is what is left when the dictionary ending is removed, and it is the piece everything else attaches to. The honorific marker goes next and it raises the person being talked about, which is a separate axis from how formal you are being with the listener. Then the tense. Then the ending, and the ending is where the speech level lives, so the last syllable of every sentence is a statement about the relationship.
Particles do the other half of the work, marking what each noun is doing, and the set is small. There is a topic marker and a subject marker, which are not the same thing and are the perennial argument; an object marker; a set marking place, direction and instrument; and a handful adding a nuance rather than a role, such as also and only.
What makes this system feel large is that textbooks present each combination as a separate item to be learned, so a learner meets several hundred numbered patterns. Most of them are two or three morphemes stuck together in the standard order, and a learner who has the parts can decode a pattern they have never met, which is the same return the root and pattern system gives elsewhere in this pillar.
Learning the patterns as vocabulary
Here is where the grammar becomes enormous, and it is a presentation problem rather than a language problem. Because every course lists combinations, a learner treats each one as an item, builds a deck of several hundred patterns, and reviews them for a year. It works, slowly, and it hides the structure that would have made it fast.
The alternative is to split every new pattern the moment you meet it. Which morphemes are in this, and in what order, and what does each one contribute. That takes thirty seconds per pattern and it turns the list into a system, after which a new pattern is a new arrangement rather than a new fact. It also transfers directly, which is worth knowing before you start: the sentence shape is close enough to Japanese that a learner of one gets most of this for free in the other, which is the argument at the end of the Korean page above this one.
A small set, three jobs
The particles, sorted by what they are marking
The columns are jobs rather than levels. The first column is the one that costs, and it costs because the choice depends on the previous sentence.
- What the sentence is about3
- The topic marker, for what is already in play
- The subject marker, for what is new or picked out
- Neither, when the context is obvious
- The role in the clause4
- The object marker
- Place, and where something is
- Direction, and where it is going
- Instrument, and what it was done with
- Adding a nuance3
- Also, and too
- Only, and just
- From, and until
The third column is where learners are most comfortable and where the least is at stake. The first column is two particles, and getting them the wrong way round produces a correct sentence that says something you did not mean.
Two references, and neither is a course
The Korean Grammar in Use series is the reference most serious learners end up with, arranged by pattern with the confusable ones set beside each other rather than in separate chapters. It replaced the grammar appendix at the back of a textbook, which states each rule once and never contrasts it with the three patterns it will be confused with. Paid, in three volumes by level.
A model is the other half and it is used here for one narrow job: give it a conjugated verb and ask which morphemes it contains and what each one does. It replaced working the analysis out by hand with no way to check it, which is where a self-taught learner is for the first year. Free at this level. Ask for the split rather than the translation, and check anything surprising against the reference, because the failure mode is a confident wrong analysis rather than a refusal.
The mistake: choosing the topic marker by habit
The topic marker and the subject marker are both frequently translated as nothing at all in English, so a learner picks one and uses it everywhere, usually the topic marker, because that is the one the first lesson introduced.
What that produces is a sentence that is grammatical and says the wrong thing, which nobody corrects. The topic marker announces what the sentence is about and usually carries something already in play; the subject marker introduces something new or picks it out from among others. The choice therefore depends on the previous sentences rather than on the current one, which is why no rule settles it and why fifty marked examples from a real text do more than any explanation. That is the same kind of distinction, learned the same way, as the one in particles, and a verb that waits at the end.
What the endings are attached to
The last piece of every sentence is the speech level, so the grammar and the social decision are the same syllables, which is formal, polite and casual, and the cost of the wrong one. The stems being conjugated come from two different vocabularies with different registers, in native Korean, Sino Korean, and when each is used. All of it is unreadable until the blocks are automatic, in fourteen consonants, ten vowels, assembled into blocks. And the endings themselves change shape when they meet the stem, which is sounds that shift depending on their neighbours. Splitting a pattern into parts is also the kind of thing that decides what belongs on a card, in making cards that teach rather than cards that pile up.