elementary · freeInteractive lesson
ㅂ irregular
Try it freeCompare + self-checkRead the contrast, then take the on-page quiz.Open →Explanation
Many ㅂ stems become 우 before vowel endings: 춥다 → 추워요, 어렵다 → 어려워요.
Not all ㅂ words are irregular. Check frequency lists.
Weather vocabulary depends on this set.
Mistake: 춥어요 / 덥어요 by regular analogy.
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
오늘 정말 추워요.
It’s really cold today.
문제가 어려워요.
The problem is hard.
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.
Keep learning
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Repair the pattern with corrected examples, then reinforce the right form through short review and speaking practice.
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