宾语从句中有哪些殊句型不使用陈述句语序

题目

宾语从句中有哪些殊句型不使用陈述句语序
比如像what`s the matter,what`s wrong,还有哪些
列举3,4个就足够了.

答案

当连接词作从句的主语时,比如：
I don't know who is the best one in the class.
I understand which is better.