Can you check if this image is right?
I made this image to help me learn polish. It is in portuguese, but you'll probably be able to understand most of it. If you find any errors, please let me know. Thanks!
Substantive means Noun Adjetivo means Adjective
Yes, seems fine to me. You should obiously pay attention to every noun on its own because they tend to be irregular. (Feminine and neuter ones not so much, but it can be hard to figure out which masculine nouns take the ending "a" and which "u" in genitive case.) Furthermore, it's quite difficult to make declensions based on that table as you have several possibilities with each case. I recommend you to learn each case on its own while collecting examples for the different genders etc. Maybe take advantage of some example phrases from the web or something. Boa sorte com teu polonês!
That is a great list! Let me translate:
Masculine nouns with genitive ending -a are (amongst others):
- All months, except for luty
- Days of the week, expect for środa, sobota, niedziela
- tableware and cutlery
- fruits and vegetables
- body parts
- units of measurement
- some terms pertaining astronomy
- all masculine nouns that end in -ik and -ek
Thanks for the compliment! However, the list is certainly to be continued.
For example with words from English, especially pertaining digital technology (SMS, mejl, komputer). What's about komputer, I got the feeling that Polish people like to put a-genitives whenever the noun starts with a "k". Not always, but frequently.
I just realized that it says "Alle Maskulina auf -ik /-ek", implying that there aren't any exceptions, and yet there are (posiłek -> posiłku). I also noticed that poniedziałek is wrong. Difficult topic...