I don't know how should I do和 I don't know how I should do 这两个哪个对?为什么

问题描述:

I don't know how should I do和 I don't know how I should do 这两个哪个对?为什么

后面那句
从句中要用陈述句语序,而第一句从句还是问句语序,所以后者对