请问in order that 引导的是什么类型的从句?它与so that /so as to/in order to

引导名词性状语从句,表示目的的,
其实这些短语在有时候可以代换,例如：
I get up early in order to catch the early bu
=I get up early in order that I can catch up the early bus =I get up early so as to I can catch up the early bus .名词性从句可以分为：主语从句,宾语从句,表语从句和同谓语从句.例如：
一、概述
1,主语从句
What he wants is a piece of paper.
It is believed that he can solve the problem.
注：1）主语从句的谓语动词用单数.
2） 连接词that引导主语从句时,that不可省略.
3）在表示"是否"的含义时,主语从句只能用whether,不能用if.
2,宾语从句
I don't know how to solve the problem.
Do you know where he lives?
注：宾语从句用正常语序.
3,表语从句
The problem is who can help me.
This is why I came here.
注：1）连接词that引导表语从句时,通常不可省略,口语中可以省.
2）表语从句只能用whether,不能用if.
3）表语从句还有两个连接词,as if和because.如：
It looks as if it is going to rain.看来到下雨.
That is because he missed the morning train.那就是因为他没赶上早车.
4,同位语从句
I have no idea where he went.
I heard the news that he would come.
注：同位语从句用that引导,常跟在fact,idea,news,promise,thought,message,hope,belief,doubt等词后,that在从句中不作任何成分.