oh,no!we'retoolate.thetrain.that'sok.we'llcatchthenexttraintolondon.A.wasleavingB.oh,no!we'retoolate.thetrain.that'sok.we'llcatchthenexttraintolondon.A.wasleavingB.hadleftC.hasleftD.hasbeenleaving怎么看出来用

Question

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.

Answer 1

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