By the time I got to the bus stop,the bus alreadyA had leftB leftC have left D leaves

问题描述:

By the time I got to the bus stop,the bus already
A had left
B left
C have left
D leaves

A 过去完成时
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A
考察过去完成时态,我(过去)到达车站时,车子(在过去的过去)已经开走了.