In order to, so as to, to پیش از شکل ساده بکار می روند و یکی از این معانی (که، تا، برای و برای اینکه) را می دهد.
In order to و to می توانند هم در ابتدای جمله بکار روند و هم در وسط
ولی so as not to معمولا در وسط جمله بکار می رود.
آنها در جملات پیچیده ایی بکار می روند که دارای دو فعل و دو عمل هستند اما فاعل آنها یکی است.
(جمله پیچیده جمله ایی است که بیش از یک فعل در آن بکار رفته باشد.)
I went to his office to meet him.
I went to his office in order to meet him.
To reach him, I had to wait for five minutes on the line.
In order to reach him, I had to wait for five minutes on the line.
In order not to wake up the baby, I tiptoed into the room.
I talked to him so as to have a better understanding of the situation.
I went to the post office so as to buy some stamps.
I am leaving now so as not to be late.