우유를

In a sentence

• 나는 우유를 마셨어요.

  I drank milk.

  In this sentence, '우유를' (milk in accusative case) functions as the direct object of the verb '마셨어요' (drank).

• 그는 아침에 우유를 먹었어요.

  He had milk in the morning.

  Here, '우유를' (milk in accusative case) is the direct object for the verb '먹었어요' (ate/had).

• 우유를 사러 가요.

  I am going to buy milk.

  In this context, '우유를' indicates the object to be purchased, directly tied to the action of the verb '사러 가요' (going to buy).