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Explanation

르 irregulars pick up an extra ㄹ with vowel harmony: 모르다 → 몰라요, 빠르다 → 빨라요.

High-frequency set: 모르다, 빠르다, 다르다, 오르다…

Automate these early for listening speed.

Mistake: 모르아요 / 빠르어요.

Level: elementary. Read both sides of the contrast, say the examples out loud, then write one correct and one incorrect sentence and fix it.

Cross-link: open the related grammar or tools page the same day so the fix sticks in your study graph.

Examples

잘 몰라요.

I don’t really know.

기차가 빨라요.

The train is fast.

Common mistakes

  • Translating the English pair word-for-word without checking which Korean form carries the real distinction.
  • Treating the two forms as free synonyms after memorizing only one example.

Related

Common mistakesAll comparisons르 irregular

Keep learning

The romanization trapPoliteness lives on the verb저는 is not genderedSpacing before 요반말 timingVerb at the endNull subjectsBatchim linking

Ready to level up 르 irregular?

Repair the pattern with corrected examples, then reinforce the right form through short review and speaking practice.

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