THAT IS WAY I DON'T WANT TO GO WITH YOU. 这个句子是表语从句还是定语从句?

问题描述:

THAT IS WAY I DON'T WANT TO GO WITH YOU. 这个句子是表语从句还是定语从句?
高人帮帮忙,语法书上写的有点费解.
是WHY,不是WAY,打错了。

那个是 way还是why
如果是 way 就是定语从句 That is way (that) I don't want to go with you.
That is why I don't want to go with you.
why引导表语从句