thx a lot, but what if we don't know whether it's regular or irregular , like when you have a verb in the infinitive form and you need to make past perfect, how can we know when to add a "t" and when we a add an "en", do we need to memorize the verbs ?? thx in advance :)))))

Thank you….. But are you sure you can't tell irregular from regular verbs with partizip? I was trying to understand partizip perfekt using this method….. So how do I learn partizip perfekt?

its 2021 and i learnt how to identify verbs from this video! many thanks