特殊疑问句的基本结构如下：

1、特殊疑问词+助动词+主语+实义动词+其他？例如：What can I do for you today?

2、特殊疑问词+谓语动词（组合）+主语+其他？例如：What is your name， please?

3、特殊疑问词+助动词+实义动词+其他？例如：What has been offered to the poor homeless children for the coming winter?

4、特殊疑问词+谓语动词（组合）+其他？例如：What must be finished first before we go to picnic two days later?

综上所述，特殊疑问句运用时要注意选准特殊疑问词、词序、句子的时态（由助动词显示）。