4.4.2 Grammar Spot - Infinitive of purpose

To + infinitive can be used to express purpose 

- Why did you go to Paris? 
- To visit a friend. 
  I have come here to help my cousin. 

If the subject of the action expressed by the infinitive is not the same of the main verb of the sentence,
we use the following structure: 

 She has come here for me to see her new haircut.