Core Grammar Rule: ~더라 / ~던데
Use these endings to talk about something you personally saw, heard, or felt in the past. It adds a nuance of recalling a past observation, often with a sense of mild surprise or discovery.
Meaning & Usage
Meaning: ~더라 is used to state a recalled fact as a complete sentence. ~던데 is used to present the recalled fact as background information, often leading to a question, a contrasting statement, or a suggestion.
When to use: Use them when you're the source of the information, sharing your direct experience. You cannot use them to talk about your own intentional actions. For example, 내가 어제 도서관에 가더라 (I went to the library yesterday) is incorrect. You can, however, use it to describe your own past state or feeling, like 그때 내가 정말 배고프더라 (I was really hungry back then).
Conjugation Rules
Rule: Attach directly to the stem of a verb or adjective, regardless of whether it ends in a vowel or a consonant. For nouns, use (이)더라 or (이)던데.
Verb/Adjective Stem + 더라/던데 / Noun + (이)더라/(이)던데
Core Grammar Rule: ~(으)ㄴ/는/었)지 뭐야
This pattern is used to express surprise at an unexpected discovery or result. It's like saying, "and you know what?" or "it turned out that...!" in English, with a strong sense of astonishment.
Meaning & Usage
Meaning: It highlights that the outcome was completely contrary to expectations. It’s a very colloquial and expressive pattern used frequently in storytelling among friends.
When to use: Use it at the end of a clause that reveals the surprising twist. It's almost always used in casual speech (반말). You cannot use this for something you planned or expected. It must be a genuine surprise.
Conjugation Rules
Rule: The tense is expressed in the part before ~지 뭐야.
Past: Verb/Adjective Stem + 았/었지 뭐야 (e.g., 만났지 뭐야, 예뻤지 뭐야).
Present (Action Verb): Verb Stem + 는지 뭐야 (e.g., 가는지 뭐야).
Present (Adjective/이다): Adjective Stem + (으)ㄴ지 뭐야 (e.g., 예쁜지 뭐야), Noun + (이)ㄴ지 뭐야 (e.g., 학생인지 뭐야).
Past: ~았/었지 뭐야 / Present (Verb): ~는지 뭐야 / Present (Adj): ~(으)ㄴ지 뭐야