my mother wants me to study hard what my mother want.是一个定语从句吗?

what my mother want 是宾语从句,作study 的宾语
因为从句太长,为了保持句子平衡而把hard 前置了
还原是这样的：
my mother wants me to study what my mother wants hard
我母亲想要我努力学习她想要我学的东西那能不能变成一个定语从句？可以呀my mother wants me to study hard all that my mother wants这里that my mother wants 就是修饰代词all 的， 是定语从句， 意思不变！！那可以把that改成what吗what 不是关系代词，怎么可以引导定语从句呢？哦