She was too preoccupied to speak and had shed so many tears that she could cry no more.

shed 是动词 shed 的过去分词形式，shed 的意思是"流出、掉落"，常用于指眼泪、血液等液体的流出。 tears 是名词 tear 的复数形式，tear 的意思是"眼泪"，指从眼睛分泌的透明液体。 shed tears 是一个固定搭配，意思是"流泪、哭泣"。