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求have/has been . had been与was的区别 要详细.易懂 好的给加分
最好有例句说明
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推荐答案 2010-08-20
have/has been是be动词的现在完成形式
had been 是be动词的过去完成形式
was是be动词的过去式
另外,be动词的一般现在形式有;am、is、are
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