past simple

gammar
http://www.curso-ingles.com/gramatica-inglesa/pasado.php

www.curso-ingles.com/gramatica-inglesa/pasado.php

exercises
http://www.myenglishpages.com/site_php_files/grammar-exercise-simple-past.php#.Uzp3LaKLUuA
http://www.ego4u.com/en/cram-up/grammar/simple-past