逗号加ving到底是修饰前面紧挨的名词，还是主语

cuishiliu

看了很多关于ving的修饰语，
很多人都说逗号加ving 是修饰谓语或者句子，不能就近修饰名词，要就近修饰名词就不能有逗号
而且，逗号加ving一般是表达simutaneous或者direct and immediate consequence

但是og上有一题。                                                [size=10.000000pt] In a plan to stop the erosion of East Coast beaches, the Army Corps of Engineers proposed building parallel toshore a breakwater of rocks that would rise six feet above the waterline and                                                         [size=10.000000pt]act as a buffer, absorbing[size=10.000000pt] theenergy of crashing waves and protecting the beaches.

这个absorbing显然不是修饰 the Army Corps of Engineers啊。。貌似是修饰buffer的，但是逗号加ving不是不能就近修饰嘛。。。