待讨论的句子:
The old rules have to be revised because they only applied to the circumstances that existed when they were made a hundred years ago.
问题:
这个when从句是什么从句?
我的思路:
1.定语从句,先行词是circumstances,但是没有找到该词作when先行词的例子。且语义不符,应该可以排除。
2.状语从句,作existed的时间状语。
3.作定语修饰the circumstances,但并非定语从句,而属于副词从句作定语。