such as 和that的区别

看例子：
This is such a difficult problem that all of us can't work it out.句中，that是从属连词，引导结果状语从句，在从句中不作成份。

This is such a difficult problem as all of us can't work out.句中，as 是关系代词，引导定语从句，在从句中作宾语。

这两个截然不同,没有区别的.我告诉你,学习英语不注重在语法.我主要是积累.语法我从来不学,考试120没有问题.我不是骗子,实话.

such as + n./pron.
that引导从句