so和such都有“如此、这么、那么”的意思，可进行同义改写，但用法不同。
1、so是副词要用来修饰形容词和副词；such是形容词用来修饰名词。他们后面接单数可数名词的用法如下：
so+形容词+a(n)+名词
such+a（n）+形容词+名词
2.、和“that”连用时，意思基本一样，但句型结构不同。
so+形容词/副词+that.../ so+形容词+a（n）+名词单数+that.../so+many（few）+名词复数+that.../so+much（little）+不可数名词+that...
such+a（n）+形容词+单数名词+that.../such+形容词+名词复数+that.../such+形容词+不可数名词+that...
3、so可以和that连用构成“so that”词组引导目的和结果状语从句，表示“以便、以致”的意思。so修饰形容词，such修饰名词。简单分辨用so或such，如 good news 最后一词是news，是名词故用such。
例句：
1、Do you think that made much of a difference to the family?' — 'I think so.'
“你认为那会给这个家庭带来很大的变化吗？”——“我认为是这样的。”
2、I enjoy Ann's company and so does Martin
我喜欢和安在一起，马丁也一样。
3、Each member of the alliance agrees to take such action as it deems necessary, including the use of armed force
该联盟的每一位成员国都同意采取其认为必要的行动，包括动用武力。
扩展资料
Gold has been a poor investment over the past 20 years, and will continue to be so
最近20年来投资黄金的收益很差，今后仍会如此。
Clasp the chain like so.
像这样扣上链子。
He was said to have written such books as The Day of Locusts and Miss Lonely Hearts.
据说他曾经写过《蝗虫之日》和《寂寞芳心小姐》之类的小说。
I think most of us don't want to read what's in the newspaper anyway in such detail
我想我们大多数人无论如何都不想如此仔细地去读报纸。
参考资料：百度百科：英语语法