Explain the difference between -고 있다 (action in progress) and -아/어 있다 (resulting/state after an action). Show how to form affirmative, negative, and interrogative sentences for each meaning.
Learners will be able to explain the difference between -고 있다 and -아/어 있다 and correctly choose and form sentences (affirmative, negative, interrogative) that express either ongoing actions or resulting/stative conditions.
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