I like the "dog example" too, which highlights the different forms/cases:

https://linustechtips.com/main/topic/72936-english-swedish-g...

I'm a recent immigrant to Finland, and while the regular grammar makes some things simple, the cases and suffixes are enough to drive me crazy! The simple things are easy to handle if you're reading a textbook, but remembering them in real-time when speaking is very hard.