But they are always talking about what will happen if I don't succeed.请问一下从句中

问题描述:

But they are always talking about what will happen if I don't succeed.请问一下从句中
句子不是要用陈述语序吗,这里的what 后为什么用的是疑问语序,

what 本来就是句子的主语,它本来就是陈述句语序