I know everybody hates studying irregular verbs, but you all have to do it for several reasons, here are some of the most important reasons:
1. It is necessary for the simple past in affirmative ( though we don´t know how to form it we can already speak in the past). We use the second column.
2. We need the thrid column(past participle) for perfect tenses ( present perfect, past perfect...)
3. The past participle is also used for the passive voice ( to be + past participle)
So, click on the link and print it if you don´t have a list of irregular verbs at home.