The difference between 은 (eun) and 는 (neun)

The 은 (eun) and 는 (neun) are postpositions. Postpositions are used to define the case of a noun, or the grammatical relation between the words. Postpositions do not exist in the English language so this will be an abstract description.

은 (eun) and 는 (neun):

There are at least two applications for 은 (eun) and 는 (neun): contrast and topic marker. In short, contrast defines the sentence style (Question or answer) and topic marker defines the subject in a sentence. Just like before; if there is a batchim, use 은, if not, use 는.

In practice – contrast:

The question uses 이/가 and the answer 은/는.

수나가 학교를 갑니까?  (sunaga haggyoleul gabnikka) – Is Suna going to school?

In practice – topic marker:

Noun’s with a 은 (eun) and 는 (neun) in the end become the topic of the sentence. With every sentence about a persons action, use 은 (eun) and 는 (neun). Otherwise use 이/가 .

저는 읽고 있습니다. (jeoneun ilg-go issseubnida.) - I am reading