So far, question words in Chinese have always appeared at the end.. but with "shei" I saw sentences like "Shei shi nide baba?" So it can be used at the start or end of a sentence? We could say, "Nide baba shi shei?"as well? And also "Shei shi nage ren?" or "Nage ren shi shei?" (Who is that person?)?
Is this restricted to shei or can it be extended to other question words like shenme, zenme, duoshao and nali/nar though words like ma and ne I know are always placed at the end?
Ok please see this, it's so confusing: