6. 用作状语
（1）目的状语，置于句首或句末，置于句首时常表示强调。
In order to catch the early bus, she got up very early.
为了赶上早班车，她起得非常早。
A group of young people got together to discuss this question.
一组青年聚在一块讨论这个问题。
She came to this city to visit her daughter.
她来到这个城市看望她的女儿。
（2）缘由状语，多见于sb.+be+adj.+to do...结构句中。
I feel very lucky to have him.
拥有他我感觉非常幸运。
（3）结果状语，多见于too...to，enough to...结构句中。
Im too tired to do it well.
我太累了以至于做不好这件事。
The room is big enough for three people to live in.
这个房间三个人住足够大。