名词1 + 定语1 （介词 + 名词2）+定语2
怎么样确定 定语2 修饰 名词1 还是 名词2？
1. the boy under the tree in front of the house
under the tree（定语1）；in front of the house（定语2）
定语2既可修饰the boy也可修饰the tree
2. the fish in the pond in front of the house
in the pond（定语1）；in front of the house（定语2）
定语2只能修饰the pond