Hi, everyone. I just found there are some rules to make a Dutch noun plural. For example, zus(sister) becomes zussen, boom(wood) becomes bomen. I thought it is very straightforward, however, I found another plural form... like, appel(apple) to appels, tafel(table) to tafels. Just like English! I understood that one-syllable word tends to add -en while multi-syllable word simply put -s behind, and that's how I convinced myself. But ever since I learned broer(brother) becomes broers, not broeren,I am completely lost. Is there any rule? Or is it completely irregular and I have to memorize all the cases? Thank you for your answers in advance.