求助一个关于which修饰的问题

chenmengmillie

There are several ways to build  solid walls using just mud or clay, but the most extensively used method has been that bricks were formed from mud or clay, which, after some preliminary air drying or sun drying,were laid in the wall in mud mortar.

这句话里面的which为什么不是指bricks因为后面谓语动词是were laid。 OG里面说which指 mud or clay但是这里谓语动词是were不应该跳跃修饰吗？
跪求各位解答！！！！！！

chenmengmillie

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huimousanguo

which是绝对不可能指代bricks的，因为which和bricks之间隔了一个were的谓语动词，which指代原则是不能跳跃谓语动词指代，所以只能指代mud or clay