Spanish people sometimes say: “never in my life” which is a direct translation from Spanish: “nunca en mi vida”. I probably don't need to tell you that “never in my life” is Spanglish. You were expecting that. The best way to translate “nunca en mi vida” is “I have never” (this is the way your English teacher will say it) or “I've never” (this is the way most native speakers say it).
The “I have never” construction is generally easy to use but you need to have knowledge of the present prefect tense to be able to say it properly. So, yes, you need to know those three horrible columns of irregular verbs that you hated so much when you were studying English at school: put, put, put!
Once you have learnt those you can create a sentence like this:
“I've never been to Japan, but I would like to go.”
Hope that helps!
Soy el director de Daniel Smith + Partners. Tengo más de 10 años de experiencia enseñando inglés a españoles.