[Grammar] ‘으’탈락: ‘으’ drop verbs

 ‘으’탈락 :  ‘으’ drop verbs

I put the title as ‘으’ drop instead of ‘으’ irregular because the ‘irregular rule’ has an exception(also is called the regular rule), but ‘drop rule’ doesn’t have an exception. That means every verb and adjective ending in ‘으’ , it drops ‘으’ when it meets an ending which beginning with 아/어.

 

Verb/Adjective(‘으’ ending) + 아/어 => ‘으’ drop
(adding ‘아/어’ depends on a preceding syllable’s vowel)

 

V/A	으 drop	preceding syllable’s vowel	change
바쁘(다) + 아/어	=> 바ㅃ	=> 바(vowelㅏ) + 아	=> 바빠
예쁘(다) + 아/어	=> 예ㅃ	=> 예(vowel ㅖ) + 어	=> 예뻐
쓰(다) + 아/어	=> ㅆ	=> no preceding syllable + 어	=> 써

e.g)

지난주에 아주 바빴어요.	I was really busy last week.
제 동생은 정말 예뻐요.	My younger sister is really pretty.
오랜만에 친구를 만나서 정말 기뻤어요.	I was so happy to meet my friend who haven’t seen for a long time.
친구한테 편지를 썼어요.	I wrote a letter to my friend.

You can also listen to the pronunciation here.