i'm going to leave the party early so that i can get a good night's sleep.harry brought his umbrella so that he could not get weti turned on the tv in order that i could listen to the news.请大家帮我总结一下so that \ in order that \ in order to有什么区别?好像还有否定形式是吧,我都搞不清有什么区别了,帮我归纳一下,多举几个例子好吗?

so that 可引导目的状语从句及结果状语从句,
区别在于:引导目的状语从句时, so that 从句常同情态动词can, could 连用.

in order that 只能引导目的状语从句

in order to do sth. 只能作目的状语,位置可放句首,句中或句末.

如问题中的句子:
I'm going to leave the party early so that I can get a good night's sleep.
Harry brought his umbrella so that he could not get wet.
这两句中, so that 都是引导目的状语从句.

I turned on the TV in order that i could listen to the news.
in order that 引导目的状语从句, 可改成in order to do sth.结构.
I turned on the TV in order to listen to the news.

I got up very early yesterday morning , so that I caught the early bus .
此句无情态动词can或could ,因此so that 引导的是结果状语从句.

表示目的：
so that 可以与in order that 替换，与in order to的区别是，前者接句子（如上面你的句子），而后者接动词不定式。

so .... that 的意思
He got up so early that he didn't get a good sleep last night. “如此....以至于....” 表示结果
He got up so early that he could catch the first bus. "如此....以便..." 表示目的

so that 意思是所以,也就是说,so that前的部分是一个事,so that后的部分是前面这个事所带来的结果.
翻译下你的举例：
哈利带了他的雨伞所以他不用淋湿
in order that 的意思是以便,也就是说 in order that 前的部分是一件事,in order that后的部分是做这件事的原因
in order to 的意思和 in order that的意思一样,唯一的区别在于,in order that 后面接的是一个完整的句子,有主谓宾成分的句子,that的作用就是连接这个从句.
用你的例子说明：
I turned on the TV in order that I could listen to the news 我打开电视是为了我能够听新闻.
I turned on the TV in order to listen to the news 我打开电视是为了我能够听新闻.
希望回答满意.