1NA - PURPOSE CLAUSES

Exercises:
http://www.englishexercises.org/makeagame/viewgame.asp?id=6268

Exercises + explanation:
http://www2.elc.polyu.edu.hk/cill/eap/2004/u2/purposereasonresultclauses.htm

Explanation (slideshare):
http://www.slideshare.net/englishatchabacier/purpose-clauses-2970250

Explanation + exercises:
http://www.grammar-quizzes.com/gerund3b.html