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 Subject Particle 가 and 이

The subject particle is added to a word to indicate that it is the subject of a clause. 가 is added to a noun ending in vowel and 이 is added to a noun ending in a consonant.
If the predicate at the end of the clause is a verb the subject is the executor of the verb.
   
The prices are gradually climbing
If the predicate at the end of the clause is an adjective, the adjective describes the subject.
    
The moon is truly bright tonight
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