Question

[-C21] When the old man _____ to walk back to his house , the sun _____ itself behind the

mountain.
A.was starting ; hid
B.had start ; had already hidden
C.had started ; was hiding
D.started ; had already hidden
翻译并分析，为什么选D不选B?

Answer 1

翻译：当这个老人开始向家走的时候，太阳已经落山了。
首先B中 had start是不正确的，过去完成时为 had started
其次，过去完成时应用在有一个过去的时间点做参照的情况下，即一个过去时做时间点，才用过去完成时，表示在过去的时间点之前就已经发生。
D中，started用过去时，做过去的时间点