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과거완료형 (I had done) read more »
For and since, read more »
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현재완료진행형과 현재완료형 (I have been doing and read more »
단순과거형과 현재완료형
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현재완료형 (I have done) read more »
현재완료형 (1) (I have done) read more »
현재완료형 (2) (I have done) read more »
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