으 irregular verbs
From Korean Wiki Project
Revision as of 13:16, 12 July 2017 by Jielimiya
When the verb stem ends with the 모음 “으”, the “으” is dropped whenever the verb tense ending begins with a 모음 and 어 / 아 added in it's place. Then add the normal tense ending to this new stem. See example below.
쓰다 → 써요 (ㅆ+어요)