LEARN + KOREAN / Note 42 TOPIK I

Since (-니까)

a

-(으)니까 attaches to a reason the same way -아서/어서 does, vowel or ㄹ-ending stems take -니까, consonant-ending stems take -으니까, but it can do something -아서/어서 can’t: lead directly into a command or a suggestion.

oneureun bappeunikka naeil mannayo.
Since I am busy today, let's meet tomorrow.
In Real Life
This is the reason-connector -아서/어서 promised you. -아서/어서 can’t sit in front of a command like -세요 or a suggestion; -(으)니까 is built for exactly that job. 추우니까 창문을 닫아 주세요 wouldn’t work with -아서/어서 dropped into the same slot.
chuunikka changmuneul dada juseyo.
It's cold, so please close the window.
nalssiga joeunikka sanchaekhaeyo.
The weather is nice, so let's take a walk.
i sikdangi masisseunikka yeogiro gayo.
Since this restaurant is delicious, let's go here.
sigani eopseunikka taeksireul tayo.
We don't have time, so let's take a taxi.
pigonhanikka puk swiseyo.
You're tired, so rest well.
In Real Life
-아서/어서 tends to state a plain, fact-based cause. -(으)니까 carries a more subjective, persuasive edge, closer to “given that…” than a flat “because.” It’s the reason you offer right before asking for something or proposing a plan, which is exactly why it pairs so naturally with commands and suggestions.

Vocabulary

KoreanEnglish
changmun
window
datda
to close
bappeuda
to be busy
hangahada
to be free, not busy
iyu
reason
geureonikka
so, therefore
ildan
for now, first of all
hoksina
just in case
teukhi
especially
daesine
instead of
eojjaetdeun
anyway, regardless
geunajeona
anyway, by the way (changing topic)
machangajiro
likewise, similarly
gedaga
moreover, on top of that
mullon
of course
dangyeonhi
naturally, of course
gyeolgwajeogeuro
as a result
geureomeuro
therefore
jeuk
that is, in other words
hajiman
but, however