Irregular Verbs Pronunciation

Here you have three websites where you can listen to the pronunciation of the irregular verbs:

Sherton English: very funny with pictures and examples. This my favorite!!

Verbbusters: verbs are listed by categories from the most used to the least.

My verbs Free: a list of verbs conjugated. Notice how the voice says "To begin /I began / I have begun".

Also you can listen to the most common irregular verbs through this video.