Sort into columns

Deciding when the stem keeps ㅂ

Tap each base-form-and-ending tile, then tap the column describing the resulting stem.

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Question 1

Combine each base form with the indicated ending. Sort by whether the resulting stem keeps ㅂ or changes it to 우.

Question 2

Combine each base form with the indicated ending. Sort by whether ㅂ remains or changes in the resulting form.

Question 3

Form the requested polite expression from each pair. Sort by what happens to the stem-final ㅂ.

Question 4

Apply both checks: the base form and the ending. Sort each pair by whether the completed form retains ㅂ.

Practice Deciding when the stem keeps ㅂ with this interactive word-sorting exercise of 4 questions. Tap each word into the column it belongs in, then submit to check your answers and get detailed feedback on every set.

Practicing grammar in real sentences — rather than memorising rules in isolation — is one of the most effective ways to make a structure stick. You can retry as many times as you like to build accuracy and confidence using Deciding when the stem keeps ㅂ in everyday Korean.

Looking for more practice? See all exercises for this lesson.