The Korean Writing SystemSyllablesNounsPredicatesFormal and Informal SpeechPre-Final and Final EndingsSpeech LevelAdding ㅓ or ㅏ to a predicate stemAdding 으 to predicates stemsThe Deferential Speech LevelThe Intimate Speech LevelThe Polite Speech LevelThe Plain Speech LevelIrregular PredicatesThe Subject Particle 가 and 이The object particle 를 and 을The Topic Particle 는 and 은Forming a Sentence이다 and 아니다있다 and 없다NegationPast TensePredicates as ModifiersDeterminersBound NounsDesireNumbersCountersQuestionsThe Particle 에

The Topic Particle 는 and 은

The topic particle can be added to a noun to or another particle to indicate that the marked word is the topic of the clause. When added to a particle or noun that has a , 은 is added to the word otherwise 는 is added to the word. This may be used to re-introduce a new topic or a topic that was previously mentioned in conversation.
As for myself, I am a student.
As for apples, it is said they are good for your body.
The topic particle can also used to express contrasts.
Mother is a teacher and dad is an office worker.
Is it windy outside?
It was very windy in the morning but it is fine now.