是i don't know what it means 还是i don't know what does it mean ?

是i don't know what it means 还是i don't know what does it mean ?
是i don't know what it means 还是i don't know what does it mean ?

是i don't know what it means 还是i don't know what does it mean ?
i don't know what it means.宾语从句,动词know后面的从句,用陈述句语气

前者 理由如下

第一句

前者。因为是陈述句。不谢