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have done和have been doing有什么区别
6亿文档 无限复制 网盘转存 格式转换 Ha...
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求have/has been .had been与was的区别 易懂
求have/has been.had been与was的区别 易懂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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was doing和have been doing的区别？360问答
was doing和have been doing的区别？前者是过去正在做，后者是过去在做，并保持到现在仍在做，还有继续做的趋势
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请问was 与have been用法的区别was也是be动词 在表示过去时时如何区分was 和have be的不同用法.
他被罚款200美元. have been (+-ing动词)：现在完成进行式例句与用法: More than200 films on agriculture have been released. 一共发行了200多部关于农业的影片. She is said to have been an actress about twenty years ago. 例句与用法: More than200 films on agriculture h
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have been doing 和was doing的区别
一、现在完成进行时的谓语动词构成 have/has been working
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have been doing 和was doing的区别
was doing 过去进行时，表示过去某一个阶段一直在进行的动作。have been doing 现在完成进行时。现在完成进行时 一、现在完成进行时的谓语动词构成 have/has been working 二、现在完成进行时的...
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have been doing 和was doing的区别
原文：have been doing 和was doing的区别 现在完成时中since和for的区别 张老先生8myen2 阅145 你知道for与since到底有何区别吗？时宝官 阅25 都表示“因为”，because,since,as,for 有何...
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have been doing 和was doing的区别
原文：have been doing 和was doing的区别 现在完成时中since和for的区别 张老先生8myen2 阅132 你知道for与since到底有何区别吗？时宝官 阅23 都表示“因为”，because,since,as,for 有何区别...
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have been 和had been 区别
应该是had been doing是When the action happened in the past and WAS still happening in the PAST tense. 第一个例句就是例子：本身用and连接的并列句在这就极不妥当，更有甚者是同一主语，...
was和have been
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