a destructive word to someone who is down can be what it takes to kill them

请高手分析一下该句子主谓宾结构！

can be
定语,修饰someone
表语从句:what it takes to kill them
其中:to someone who is down,修饰word
其中:it是形式主语主语:A destuctive word
谓语:who is down是定语从句 , to kill them是真实主语

S:a destructive word F/P: can be C:what it takes to kill them

someone can be what it takes to kill them 再看看别人怎么说的。