Other important sources

If you want to search the meaning of words you can use some of the online dictionaries: www.wordreference.com
http://www.linguee.es/

To see more about modal verbs you can visit various web pages:
http://www.curso-ingles.com/gramatica-inglesa/modales.php
http://www.myteacherpages.com/webpages/alfonsolopez/files/Modal%20Verbs.pdf

More exercises:
http://www.perfect-english-grammar.com/modal-verbs.html
http://www.englishpage.com/modals/interactivemodal1.htm

Something interesting:


Videos: