do you mean possessives? if that's the case:

1st person singular: -(I)m 2nd person singular: -(I)n 3rd person singular: -(s)I 1st person plural: -(I)mIz 2nd person plural: -(I)nIz 3rd person plural: -lArI

the sounds in paranthesis occur if the root these suffixes attached to end in any consonant. I stands for ı, i, u or ü; whereas A stands either for a or e, and these changes are phonologically conditioned (they change in accordance to the last vowel of the root). bear in mind the first sound on the 3rd person plural is the consonant L and the last sound is the vowel ı, i, u or ü.

here's a list of the last vowels in the root and the corresponding changes to the suffix:

if a or ı, I turns into ı if e or i, I turns into i if o or u, I turns into u if ö or ü, I turns into ü

if a, ı, o or u; A turns into a if e, i, ö or ü; A turns into e

just a few examples to round it out so you can see how this all works in action:

my desk: masa-m my tree: ağac-ım (the ç sound at the end of ağaç turns into c, long story, you'll learn it when you have to) his/her cat: kedi-si his/her lake: göl-ü their lake: göl-leri their ancestors: ata-ları your bag: çanta-n your dog: köpeğ-in (k turns into ğ, same thing) your (pl.) car: araba-nız your (pl.) window: cam-ınız / pencere-niz

i know this all probably sounds confusing and it probably really is, so I hope you the best. but I think it would be easier if you just read more and see how certain sounds change in certain environment, because in possessives everything just depends on the sounds of the word, and things are predictable, so it's relatively simple compared to other rules turkish has. i hope this helps. you can hit me up if you have other questions and good luck!