to do sth 不定式做目的状语“为了……
--Hi， Li Ming. Why are you in such a hurry(匆匆忙忙的)?
-To catch ； the 7:30 train.
The doctor did what he could to save the girl .
不定式做目的状语就是 to do sth作为目的的干某事 定语是修饰限定名词的词或短语，做定语一般后置，就是后位，也就是后置定语
如：: He donated 1000 yuan to help the orphanage.
这里的to do 就是作为一种目的 She spent one day to download his film.
The woman to be invited is her aunt. to be invited 就是后置定语 ；
to do 不定式做目的状语的
例句:To record press both buttons.录音时须按双钮。
To avoid any delay please phone your or derdirect.为免延误，请直接打电话订.
to do作状语的例子
to do是动词不定式，是非谓语动词形式之一，在句子中可作状语，表示原因、目的和结果。
例句：
一：表示原因：
1、I am glad to see you.
2、We are happy to meet them again.
二：表示目的：
1、Mary came here to borrow my bike.
2、Tom got up very early to catch the first bus.
三：表示结果：
1、Bob is too young to go to school.
2、Peter is strong enough to carry that heavy box.
