Galu Xandarien! i have a question about genitive forms(sorry if the description "genitive" is wrong, we call it so in my language). for example, how do we say "the king's sword"? what i think is convert it in "the sword of the king" and that means it is "i grist en-aran". Is that right and/or is there an alternative way?
You can either say: I grist en-aran = The sword of the king (as you have used) or simply I grist aran = The king's sword
When doing phrases of the type "x's y" such as dragon's teeth or Bilbo's house, switch it round in your mind so it becomes teeth of dragon, house of Bilbo, and then you'll get the correct word order: Negyl amlug = Dragon's teeth (literally teeth of dragon) Bar Bilbo = Bilbo's house (literally house of Bilbo)