宾语从句疑问句

这里what充当宾语从句的主语，所以what is本身就是主+谓的正常语序，不需要倒装。
(1).Bill wanted to know who did this.
(2).I don't know what's the matter with Bob?
(3).I don't know what's wrong with them?
记住这个原则
在作为宾语从句时，始终保证主语+谓语的陈述顺序

看这个例子

例如
Could you tell me where you are from?(where作from的宾语，整个from where作宾语从句中的表语) (或者说Could you tell me from where you are? 总之保证主语+谓语这1陈述顺序，即you are而不是are you)

这个在这里就是陈述句顺序。what 在这里引导了一个宾语从句这你已经知道了。如果把它单独挑出来看，其实相当于说：

Something was wrong with him.

what was wrong with him.就是一个陈述句语序，what 是主语，was谓语部分。

Please tell me what brings you here today .请告诉我，今天是哪股香风把你吹来了。
what主语，brings 谓语

你说的是对的，宾语从句中的疑问句要用陈述句语序，但这里What was wrong由于主语就是what，所以本身就是陈述句语序，所以不用变啦。

因为what是主语， what was已经是主谓顺序了。wrong不是主语啊