求解释一个英文句子a set of rules which states what the well-formed pa

短语大致译为,说明何为任一语言中合适的组织模式的一套规则
which states...是定语从句来修饰rules
states后面的what the well-formed patterns for any particular language are是state的宾语从句,原句是what are the...
而在宾语从句中,除了what's wrong with;what's the trouble with这类外,其它均要改变语序,所以如题所见are放在最后
Eg Let me tell you who they are.
We didn't know what was wrong with him