oh,no!we're too late.the train__.that's ok.we'll catch the n

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 11:53:38

oh,no!we're too late.the train__.that's ok.we'll catch the next train to london.A.was leaving B.
oh,no!we're too late.the train__.
that's ok.we'll catch the next train to london.
A.was leaving B.had left C.has left D.has been leaving
怎么看出来用现在完成进行时,而不是现在进行时和现在完成时.

现在完成进行时其表达的意思有两种：1.表示从过去某时开始一直持续到现在的动作,并且还将持续下去.2.表示在说话时刻之前到现在正在进行的动作.火车在说话前在开,我们来时还在开,这里是第二个意思,不是现在进行因为我们来之前就有了,不是现在完成时因为火车还在开的,所以是现在完成进行时
再问：那现在完成时是指现在停止了吗？
再答：没有，是仍在进行的，但我们话说完了，火车开着
再问：能再详细说一下现在完成时的区分吗，还是不会。谢谢。
再答：不好意思，刚才我把完成时看成了现在完成时了，现在完成时是现在就做完了

现在完成时指，过去发生并且已经完成的动作对现在造成影响或后果，过去某一时间开始并一直持续到现在并且有可能还会持续的动作或状态。简单的说现在已经做完了，而完成进行时还在进行的。

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