题目内容

19．Unfortunately，by the time I got there，the bus ______．（　　）
A．had leftB．have leftC．leftD．is leaving

分析 不幸的是，当我到那的时候，公车已经离开了．

解答 答案：A．
结合句意get和leave两个动作，leave先发生，也就是过去的过去，故用过去完成时had+过去分词，leave的过去分词left，故答案是A．

点评 过去完成时表示过去某一时间或动作以前已经发生或完成了的动作对过去的某一点造成的某种影响或是结果，用来指在另一个过去行动之前就已经完成了的事件．它表示动作发生的时间是"过去的过去"，侧重事情的结果．

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