To be able to make full use of past and perfect tenses, passives, conditionals and reported speech, mastery of the irregular verbs is essential.
[url=
http://www.verbbusters.com]VerbBusters[/url] offers a free and fun way to get up to speed, as well as a complete set of reference materials including lists with audio.
You can help to provide support for your language by contributing translations to the database at [url=
http://www.verbbusters.com/wiki/wiki.php]VerbBusters Wiki[/url].