my-korean1-2nd-ed

UNIT 7 어제 뭐 하셨어요?
Even though the two sentences in (4) are past tense, when we join them with
+고, we don’t use the past tense form in the first clause, but only in the final
clause. The ending +고 carries the grammatical function of past tense from
the final verb to the first verb, so it is just added to the verb stem.
(5) 저 식당은 싸고
음식이 맛있어요
That restaurant is cheap and
the food is delicious.
As you can see from example (5), you can also use +고 to link clauses that
end in an adjective, and the rule is exactly the same as for verbs.
More examples:
(6) 저는 피아노 치고
제 여동생은 노래 불렀어요.
(7) 저는 어제 집에서 텔레비전 보고
공부했어요.
(8) 어제 친구 만나고
여섯 시쯤 집에 왔어요
(9) 저녁 먹고
집에 왔어요
I played the piano and
my younger sister sang.
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Yesterday I watched TV at home
and then I studied.
I met a friend and then
I came home about 6 o’clock.
I came back home
after eating dinner.
(This structure can also be used to emphasise that you did not just do the
second action, but did something first. For example, a mother might ask
her son “Have you had dinner?” upon his arrival at home in the evening,
to which he could reply “먹고 왔어요.” to emphasise that he ate before
coming home.)
Refer to the verb and adjective table in the appendices.