in order to 意為“為了……”，表示目的;在用法和意義上相當(dāng)于so as to結(jié)構(gòu)，但是in order to結(jié)構(gòu)可以用于句首、句中，而so as to多用于句中。其否定式分別為：in order not to 和so as not to。

[拓展] in order to和so as to在句中表示目的時，常可以轉(zhuǎn)化成in order that或so that引導(dǎo)的目的狀語從句。如: We should work hard in order to / so as to pass the exam. → We should work hard in order that / so that we can pass the exam.為了能通過考試，我們應(yīng)該努力學(xué)習(xí)。