求以下真实条件句和非真实条件句的句子语法分析,

When we find ourselves entertaining an opinion about which there is a feeling that even to enquire into it would be absurd,unnecessary,undesirable,or wicked-we may know that that opinion is a non-rational one.
答：主句：we may know that that opinion is a non-rational one.
时间状语从句：when we find ourselves entertaining an opinion （about which-定语从句）
定语从句：about which there is a feeling (that-同位语从句）
同位语从句：that even to enquire into it would be absurd,unnecessary,undesirable,or wicked
译：当我们发现自己能够有一种,对这种观念感觉即使去探究一下都是荒唐的、不必要的、不合乎需要的或是不道德的--那么我们或许就知道,那个观念是不合理的.
这里的when也可以理解成if,是真实的条件句.
同位语从句中主句用的是虚拟语气,隐含了一个虚拟条件