The Verb World · Lesson 5 of 6

Joining Ideas

Turn sentences into stories — ~고, ~지만, ~아서/어서, ~(으)면, ~(으)니까.

13 min

This is the lesson where Korean stops being sentences and starts being stories. Five small connectors let you chain ideas the way you actually think — and, but, so, if, because.

~고 — “and (then)”

Attach ~고 to a stem to link two actions or qualities:

밥 먹고 커피 마셔요

bap meokgo keopi masyeoyo

I eat, and (then) drink coffee.

Tense lives on the final verb only — 먹고 stays plain.

~지만 — “but”

비싸지만 좋아요

bissajiman joayo

It's expensive, but it's good.

Attach ~지만 to the stem: 어렵지만 재미있어요 (hard but fun).

~아서/어서 — “so / because / and then”

Same 아/어 harmony as the present tense, then 서. It links a cause to its result, or one action flowing into the next:

배고파서 먹어요

baegopaseo meogeoyo

I'm hungry, so I eat.

배고프다 → 배고파 (ㅡ-drop!) + 서. The reason comes first.

카페에 가서 공부해요

kapee gaseo gongbuhaeyo

I go to a café and (there) study.

Here 가서 = “go and then” — the same action-flow sense.

~(으)니까 — “because” (esp. before suggestions)

Another “because,” but 으니까 is the natural choice when a command or suggestion follows:

비싸니까 사지 마세요

bissanikka saji maseyo

It's expensive, so don't buy it.

으니까 leads into advice; ~아서 wouldn't fit before a command.

~(으)면 — “if / when”

시간 있으면 가요

sigan isseumyeon gayo

If I have time, I'll go.

있- + 으면. 한국에 가면 (when/if I go to Korea)…

팁

A gentle map: ~고 just adds; ~지만 contrasts; ~아서 and ~으니까 both give reasons (use 으니까 before a command or suggestion); ~으면 sets a condition. You don't need them perfect — just reach for the one that matches your thought.

Try it

Join with “and”: “I read a book ___ drink tea.” (읽다, 마시다)Show answer

책 읽고 차 마셔요. — 읽- + 고, tense on the last verb.

Say “It's hard, but it's fun.” (어렵다, 재미있다)Show answer

어렵지만 재미있어요.

Say “If you have time, shall we get coffee?”Show answer

시간 있으면 커피 마실까요? — 으면 condition + ㄹ까요 suggestion.

What you just learned

~고 (and), ~지만 (but) attach straight to the stem.
~아서/어서 = so/because (and “and then”); reason first.
~(으)니까 = because, especially before a command or suggestion.
~(으)면 = if/when. Tense lives on the final verb.

Quick check

Did it stick?

Three quick questions — instant answers, no grades, no pressure.

1.“It's expensive but good” uses which connector?

2.~아서/어서 expresses…

3.Before a suggestion like 사지 마세요, which “because” fits?

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The reading path explains the culture and logic that make Korean click — a perfect companion to these lessons.

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