so that,in order that,so...that...,such...that...so...that的用法

1.比较so和 such
such 是形容词,修饰名词或名词词组,so是副词,只能修饰形容词或副词.so 还可与表示数量的形容词many,few,much,little连用,形成固定搭配.
so + adj.such + a（n） + n.
so + adj.+ a（n） + n.such + n.（pl.）
so + adj.+ n.（pl.） such +n.（pl.）
so + adj.+ n.（不可数） such +n.（不可数）
so foolish such a fool
so nice a flower such a nice flower
so many/ few flowers such nice flowers
so much/ little money.such rapid progress
so many people such a lot of people
so many 已成固定搭配,a lot of 虽相当于 many,但 a lot of 为名词性的,只能用such搭配.so…that与such…that之间的转换即为 so与such之间的转换.
2.so that 和 in order that 意思相同 “目的是 以便”引导目的状语从句
You must speak louder so that /in order that you can be heard by all.你必须大点声,别人就能听见了.
3.so…that 和 such…that 如此..以至于..
结果状语从句常由so…that 或 such…that引导.so…that与such…that之间可以转换.例如：
The boy is so young that he can't go to school.这男孩年龄太小,不能上学.
He is such a young boy that he can't go to school