i dont know that is i was born

题目

i dont know that is i was born
i dont know that is when i was born这句话错在哪里?
对的一句是i dont know that is where i was born,我想知道为什么用when是错的

答案

I don't know when I was born.
when做疑问副词,可以引导宾语从句.希望我能帮助你解疑释惑.