The reason why是“做xx事情的原因是xx” The reason …because是对一个确切结果的解释,前面Reason部分直接接Because引导的原因所对应的结果。。 例如: The reason why I like her is that she's smart. I like her because she's smart. The reason why不可拆分,必须作为一个整体使用, the reason because中because作为连词可以单独使用连接两个句子。