名词性疑问分句有可能不止一个疑问词。例如，二个学生打架，老师问班长，谁先打的谁。Who hit whom first? 这是特殊疑问句。用作宾语从句时就是名词性疑问分句。The teacher asked the monitor who had hit whom first.

还可能用三个疑问词。例如：Tell me who gave what to whom.

你回到小区，看到人们在议论什么，好像杀人了。你问一个邻居：Who killed whom?