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.
such...that...和such...as的区别和用法
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.