is -ing
When used with verbs that express putting on or taking off something, such as 입다 (to wear clothes) 신다 (to wear shoes/socks), 쓰다 (to wear a hat/glasses), 끼다 (to wear a ring/gloves), and 벗다 (to take off), -고 있다 means the result of the action has continued in that state until the present. It corresponds to "is -ing" in English. The same meaning can also be expressed by using the past tense form -았/었어요 to indicate a state of completed action.
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