because +句子,也就是要有主语、谓语because of+名词或结构,没有主语、谓语例句：We have to stay at home because it is raining （+句子）=====We have to stay at home because of the rain（+名词）...because of the heavy rain becase—it rained—heavilybecause of what he had saidwhat he had said是一个名词性结构，不是句子， =the words that he had said（他说所的话）He knew （that）she was crying because of what he had said 这是一个复合句子，也就是两个句子；一个主句，一个从句 既然是两个句子，当然有两个主语两个谓语了 主句： 主语：he，谓语knew，宾语：即宾语从句 从句： 主语：she ，谓语：was crying，状语：because of what he had said what he had said 和cried 不是动宾关系，是动词和副词构成的谓语+状语的关系