So ``` that 如此.以至于.;引导结果状语从句
eg.He was so tired that he felt sleep in class.
So```as 和.一样;so 后面加形容词或者副词
eg.The blue dress is so beautful as that green one.
So ``` that 如此.以至于.;引导结果状语从句
eg.He was so tired that he felt sleep in class.
So```as 和.一样;so 后面加形容词或者副词
eg.The blue dress is so beautful as that green one.