Irish Gaelic: Genetive Case
Even though I vaguely remember my linguistics course from college, I was completely confused by references to the 'genetive case' or the 'genetive plural' in my textbooks. There wasn't any real explanation of it.
Actually, using the genetive case pretty easy, and Irish has a few rules about it.
Rule 1: A noun is in the genetive case if it is preceded by another noun.
Rule 2: When used as a 'verbal noun', one that usually ends in '-ing' in English
Rule 3: As part of a compound preposition
Rule 4: After chun (to), cois (beside), timpeall (around), and trasna (across)
Rule 5: After words that denote quantity
Rule 6: After the word cuid used for unspecified quantities
There are a few noticeable changes for the genetive case, although sometimes the words look just like they do normally.
The article 'na' is used instead of 'an' for singular feminine nouns.
Here's a quick outline of how to guess what the genetive form may be for a specific noun: