Is your father 's birthday in May?为什么不用does开头,用is

Is your father 's birthday in May?为什么不用does开头,用is Vera’s birthday is in May.改为否定句My father’s birthday is in ju when is your father's birthday?It's () october 15th 用on还是In may,your,in,is,birthday怎么连 is your birthday in may ,too?翻译 And when is your father's birthday? Is your father`s birthday on National birthday,Bill’s,in,May,is when is your birthday? 可以用my birthday is in May 回答吗 My birthday is ______ May 6th and my father's birthday is al the key may be in your bag, so it is. 为什么不用so it may Is your father ' s birthday in June?(肯定回答）讲一下