Question

Her daughter ，to whom she was devoted died from the car accidient 能不能帮我分析句子结构

为什么要用 to whom ，从定语从句知识上帮我解释下哈。

Answer 1

devoted后面应当加个逗号。

主句是Her daughter died from the car accidient。to whom she was devoted是一个非限制性定语从句，修饰daughter。
to whom she was devoted也可以说成whom she was devoted to，whom是关系代词，指代her daughter，同时在语从句中充当介词to的宾语。
这个定语从句还原成独立的句子就是：
She was devoted to her daughter.（她把一切都奉献给她的女儿。或：她全身心地爱着她的女儿。）
我们很容易看出，这里有个固定短语：be devoted to。

句意：她全身心地爱着的女儿死于那次车祸。

Answer 2

devoted to sb.所以to后面接宾格的whom,
分为两句理解，she was devoted to her daughter
2 Her daughter died from the car accidient