in order to+动词原形和so as to+动词原形 都可以放在句中。 She got up early in order to / so as to catch the first bus. 她早早起了床以便赶上头班车 。 The doctors gave her a general checkup so as to/ in order to find out the cause of her illness. 医生给她做了全身检查， 以便找出她的病因。 in order to 可以放在句首，而so as to 则不可。 In order to win the watch , they practiced hard. 为了赢得比赛，他们刻苦训练。 In order to get good results, we ought to do our best to study the lessons. 为了获得好成绩， 我们应尽最大努力学好课程。 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