when i got to the railway station,the train______(leave) already

问题描述:

when i got to the railway station,the train______(leave) already

had left
当我到火车站时,火车已经开走了.
因为when引导的句子时态是过去时,从got可以看出,而火车离站又发生在我到达之前,所以要用到过去完成时.