when they opened the capsule door,yang got out.关于when引导的状语从句

问题描述:

when they opened the capsule door,yang got out.关于when引导的状语从句
这个句子动作有先后关系,那能不能把they opened 改为 they had opened

不能改.如果把they opened 改为 they had opened,就变成强调当yang got out的时候,他们的capsule door已经开了.实际上主句——被强调的部分已经转移.但是这句话强调的是“他们一开门,杨就走了出来”,后半句yang got ...