didn't know,had't know和haven 't know用法有什么区别
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![didn't know,had't know和haven 't know用法有什么区别](/uploads/image/z/1931720-32-0.jpg?t=didn%27t+know%2Chad%27t+know%E5%92%8Chaven+%27t+know%E7%94%A8%E6%B3%95%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB)
didn't know,had't know和haven 't know用法有什么区别
didn't know,had't know和haven 't know用法有什么区别
didn't know,had't know和haven 't know用法有什么区别
时态不同:
don't know:现在时,描述的现在的一种状态,在说的时候仍然不知道
hadn't known:过去完成时,在过去的某一点不知道但是之后知道了
haven't konwn:现在完成时,在说的之前并不知道,或许刚听到了什么内容就知道了
didn't know一般过去式
had't known 过去完成时
haven 't known 现在完成时
时态不同而已,didn't过去式。hadn't 是过去的过去,haven't是现在完成时
时态不同 分别是 过去时 过去完成时 现在完成时