Learning German can be a bit tricky. There are some concepts That You Need To Understand – then from there you can build any sentence you like. HOWEVER, like in all languages, there are some things you did just have to learn.
German Academy knows this, and has some really handy posters featuring some of These Things! They are free in the reception area, and you can put them up at home to help you learn – Especially the irregular verbs.
Thanks for the free grammar posters!