This video explains how irregular verbs cannot use the same ‚recipe‘ as regular verbs when forming the past participle, and how to remember whether the auxiliary verb (Hilfsverb)is haben or sein. Using haben when you need sein, and just as commonly the other way around can be difficult when learning German.
Watch the video and find out why „Ich habe das geschrieben“ but „Ich bin nach Berlin gefahren“.
Regular verbs explained
Here you will also find a verb list with almost 130 verbs included.
Mark Twain’s Gripes with German (The Awful German Language)