I don't know how should I do ,与I don't know how I should do两句话哪个是正确的?

问题描述:

I don't know how should I do ,与I don't know how I should do两句话哪个是正确的?
I don't know how should I do ,与
I don't know how I should do
两句话哪个是正确的?这是关于语法的哪条规则呢?

第二句真确,因为在陈述语句中从句要用陈述语气,不能采用疑问语气!(而并不关有没有IT的事,问题并不在IT,而是考查陈述句从句语气问题)