Simple Past Tense

A good video explaining past tense can be found here: 

https://www.youtube.com/watch?v=wQO1UcvZraM

To practice your irregular past tense verbs, click on these links:

http://englishgrammarsecrets.com/pastsimple/menu.php

http://www.ego4u.com/en/cram-up/grammar/simple-past#exercises

http://a4esl.org/q/h/irv001-ck.html