Are you from Singapore?为什么这个Are放第一位,

Are you from Singapore?为什么这个Are放第一位, Where are you from?为什么用“are”? The boys are from Singapore(就画线部分提问) Where are you from为什么用are不用is ARE YOU FROM london 为什么用ARE不用IS where are you from?为什么用are不用do? are you in singapore?是什么意思?帮我翻译下,谢谢 -How long are you staying in singapore?-()about a week WHERE ARE YOU FROM From were are you? Are you ( )from America what are you from