in order to与so as to能和to混用么？

RT。

还有，我在语法书上看到两句例句：
We turned the lights off in order not to waste electricity.
Check your composition so as to avoid mistakes.

第一句中的in order not to和第二句中的so as to能不能分别改成not to和to呢？

in order to与so as to的区别？ so as to 与in order to 的区别 in order to 与 so that 的区别 so as(not)to 与 in order(not)to 的区别 in order to 和 so as to 有何区别 in order to 和so that to 的区别 in order to 和so as to 有什么区别 in order to与 in order that有何区别? in order to , so that有何区别 英语中的so as to;so that;in order to等等的使用区别？