http://www.linguajunkie.com/korean-2/make-korean-sentences
Top 4 basic Korean sentence structures and word orders below.
1. S + N. Subject + Noun
나는 학생이다. - I am a student.
While this structure is marked as S+ N, there is an arguable verb in there. It’s the ending - 이다- which is often used and translated as the verb “to be,” but mostly it’s an affirmative copula (a copula is a word that links the subject of a sentence to a noun or adjective, and may or may not be a verb, but is translated as “to be.”)
To break this sentence down..
나는 - I
학생 - student
이다 - verb copula and often translated as “to be”
2. S + V. Subject + Verb
Sometimes you just want to say you’re doing an action and context isn’t necessary.“What’s Bob doing around this time- Bob sleeps.” So, let’s look at the example below.
유나는 달린다. - Yuna runs. (Yuna- S, runs- V)
유나 - Yuna (a name)
는 - (topic marker and points to Yuna, because we’re taking about her)
달린다 - Run
3. S + A. Subject + Adjective
그는 정말 멍청해. - He is very stupid. (He-S, stupid- A)
그는 - He (notice the 는-)
정말 - very
멍청해 - stupid
Notice there is no verb ending here- Here’s a very important rule to know: Korean sentences must end with a verb (verb copula) or adjective. Lets try another example.
유나는 정말 예쁘다 - Yuna is very beautiful. (Yuna-S beautiful-A)
예쁘다 - beautiful
4. S + O + V. Subject + Object + Verb
This is the most common pattern of all - the SOV - pattern. Remember, English is SVO, but with Korean, we usually end sentences with a verb or a verb copula. Just start thinking in the following fashion….
I water drink. I food eat. I Korean learn… and you’re good to go.
Here’s an example.
나는 물을 마신다 - I drink water. (I-S, water-O, drink-V)
Let’s break the sentence down.
나는 - I (See- 는, the topic marker is back because we’re talking about me.)
물을 - Water (을: the object particle)
마신다 - Drink
The other sentences are combinations of the above sentence using conjunction or particle.