Question about 으다 ending words.
How do I determine whether to add 아 or 어 after? For example 예쁘다 becomes 예뻐 instead of 예빠. So is it for 아프다 ~ 아파.

Question

Answer

To be honest I never thought what is the rule for it so I google it and It's called ㅡ 탈락 불규칙 활용.
'ㅡ' 탈락 후 앞의 모음이 '-ㅏ/ㅗ'면 '-아요'를 붙이고, '-ㅏ/ㅗ'가 아니면 '-어요'를 붙인다.

It means after omit 'ㅡ' check what is the remaining vowel.
아프다 is 아ㅍ so vowel 'ㅏ'is left -> 아파요 [아프다 -> 아ㅍ -> 아파요]
예쁘다 is 예ㅃ so vowel is not 'ㅏ'or 'ㅗ' -> 예뻐요 [예쁘다 -> 예ㅃ -> 예뻐요

Further example
1. 배고프다 -> 배고프 -> 배고파
2. 쓰다 -> ㅆ -> 써
3. 슬프다 -> 슬ㅍ -> 슬퍼
4. 모으다 -> 모ㅇ -> 모아

Answers · 1

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