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 Plain Speech Level

The plain speech level is conjugated differently for declarative, interrogative, imperative and proposotive sentences. Only verbs can be conjugated for proposotive or imperative sentences.

For declarative sentences

If the predicate is an adjective or a copular, then 다 is added to the stem or to the past tense marker. If the predicate is a verb, 는다 is add to stems ending in a consonant, otherwise ㄴ다 is added to the stem, ㄴ becomes the 받침. If the predicate is conjugated in the past tense then 다 is added to the past tense ending.
The verb is conjugated as while the verb  is conjugated . In the past tense becomes   while the verb  becomes .

For interrogative sentences

니 or 냐 is added to predicate stems for spoken communication 으냐 can be added to stems that end in a consonants for written communication.
The verb can be conjugated as , , .
The verb can be conjugated as or .
The adjective can be conjugated as or

For imperative sentences

ㅓ or ㅏ is added to a verb stem followed by 라.
The verb is conjugated as .
The verb is conjugated as .

For proposotive sentences

자 is added to the verb stem.
The verb is conjugated as .
The verb is conjugated as .
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