为什么是Excuse me,could you tell me how i can get to the park?而不是 how can i

Could you tell me how i can get to the park?先给你讲一下句子成分,知道是啥从句首先改为陈述句：I could tell you how you can get to the park.其次分析句子成分：I could tell you how you can get to the park...