加了逗号,主语一样可以是O,而且不少见,例如:
In a plan to stop the erosion of East Coast beaches, the Army Corps of Engineers proposed building parallel to shore a breakwater of rocks that would rise six feet above the waterline and act as a buffer, absorbing the energy of crashing waves and protecting the beaches.
a breakwater of rocks (that )would rise six feet above the waterline and act as a buffer, absorbing the energy of crashing waves and protecting the beaches.
我觉得这句话的absorbing应该也是修饰的主语 a breakwater of rocks
毕竟只是说的 a breakwater of rocks act as a buffer, 但是事实上并不是 buffer 吸收了energy,而是 a breakwater of rocks 吸收了energy
这个应该还是要算一个伴随,主语发出动作
我还真没看到 S V O,doing修饰 O 的, 但是如果是v-ED倒是可以修饰O
一起来探讨探讨这个问题