He came out to see what was the matter?为什么不能写成He came out to see what the matter was
问题描述：
He came out to see what was the matter?为什么不能写成He came out to see what the matter was
答
你好，让我来回答你的问题吧、正好这阵子我们老师有讲到，所以我可以很肯定。
He came out to see what was the matter.
这是一句宾语从句
宾语从句，从句应该用陈述语句出现，但是总有一些句子是例外的。
有下列常见的问句，作为从句出现，是“不改变语句顺序”的。
1.What's the matter?
2.What's wrong ?
3.What's up
4.What's the problem?
5.What's your trouble?
等等、
目前，我认为较常见的就是这些问句。
另外，如果主句是过去时，带出的从句无论什么时候（真理、客观事实除外）时态也要随之变化。
例：
1.He wanted to know what was the matter.
带有客观事实的从句：
2.Teacher told the students that the Earth is round.
不知道这样说是否明白了哑~
希望能帮到你！
答
what was the matter 是固定搭配,意思是发生什么了,所以不能反过来说.