So that 不分开的意思是以便于 如果是So that的话就是如此以至于而Such后面跟形容词或者名词才可以再接That 千万不能连用 至于Too to是如此以至于 常用来做句型转换的题目 和So that可以互换 到So that但So That这个句子中That引导从句而Too to则是短语。
1、so that 和so.that
he was so sleepy that he stopped the car and had a rest（如此.以至.）他是如此的疲倦以至于他停下车来休息了一会.
he felt sleepy ,so he stopped the car and had a rest,so that he avoided accident.（以便,为了）他感觉如此疲乏,为了避免事故,所以他停下车休息了一会.
2、so.that和such.that他们的意思是一样的,只是so后面必须跟形容词或者副词,而such后面只能跟名词
he is so tall that i can not find shoes adapt to him.
he is such a tall man that i can not find shoes adapt to him.
he does homework so well that the teacher usually praise him这一句就不能用such
3、so.that与too.to（太（后面一般是形容词和副词）...而不能刚什么（后面是动词原形）
he is too sleepy to drive他太困了所以不能开车。
