分两种情况。一种是has是在一般疑问句中作实义动词，变成疑问句的时候就是变为原形have。如She has a brother in America. 变成疑问句的时候has要变成have，Does she have a brother in America? 另一种情况是has是在完成时的一般疑问句中作助动词，这个时候has是不用变的。如She has finished the homework at school. 变成完成时的一般疑问句就是Has she finished the homework at school?
