REVISION FOR THE EXAM

http://www.eclecticenglish.com/grammar/PresentPerfect1D.html

http://www.aprenderinglesfacil.es/2008/06/ejercicios-presente-perfecto-present_30.html


 http://www.isabelperez.com/happy/tenses/exercises/will_going.htm

http://www.isabelperez.com/happy/tenses/exercises/going-will2.htm