Question

i do not know who you are 为什么不是i do not know who

i do not know who you are 为什么不是i do not know who are you

Answer 1

你好，很高兴在这里回答你的问题：
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从句要用陈述句语序
who are you是疑问句语序，所以不对　

Answer 2

who are you是非正常语序，who you are才是正常语序。
who you are这个从句整个充当主句谓语know的宾语，所以不能用非正常语序，必须用正常语序。