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are books. Yours are over there. (A. our B. ours) our A: Whose… is it/are they? B:It’s/They’re ’s. It’s/They’re . 形容詞性 物主代詞 名詞性 物主代詞 my your his her our your yours mine yours his hers ours 主格 I you he she we their theirs you they A: Is this (you) b? B: No, it’s not (I ) b . ( I )is at home. A: Whose b is it? B: Perhaps it’s Helen’s. It’s (she) . A: Helen, is thi