不定式作目的状语的用法。

跟在不及物动词后面

stop to have a rest停下来休息一会 

eat to live,but not live to eat吃是为了活着，可活着不是为了吃

动词不定式常作目的状语

1.       【2009北京】Allof them try to use the power of the workstation ___ information in a moreeffective way.
   A. presenting           B. presented  
   C. being presented    D. to present  选择 d

2.     【2011浙江】If they win the final tonight, the team are going to tour around the city ______ by their enthusiastic supporters.
A. being cheered            B. be cheered        
C. to be cheered             D. werecheered 选择c

3.     【2011重庆】More TV programs,according to government to officials, will be produced _______people’s concernover food safety.
A. to raise           B.raising  
C. to have raised      D. having raised 选择a

考点1.    表伴随还是表目的

The secretary worked all night long, ____ along speech for the president.
A. to prepare    B. preparing  
C. prepared     D. was preparing

许多同学会选择A，认为目的是“为了准备演讲稿”。这说明概念还不清。

现在分词表伴随时，其动作和谓语动作是同时进行的。而动词不定式作目的状语时，通常译作“为了”，为了达到不定式所表达的目的，先做句子谓语的动作。也就是说，两个动作有先后，先有谓语动作，后有动词不定式的动作。

She got up early that morning to get thereon time. (先早起，后按时到达)

He works very hard to catch up with others.(先努力学习，后赶上别人)

而在上题中，整夜工作和准备演讲稿是同时进行的，因此选择B，现在分词。如果选择A的话，便容易误解为“先工作了一整夜，然后才准备演讲稿