Sorry,

What is a "noun sentence"? What is the translation of "Ben öðrenciyim"? And what is the translation of " Ben öðrenciyiz". What is the difference between these two expressions?

The first one is-´   I am a student´ 

The second cannot exist because ´ben´ goes with the ´im´ ending.

If the noun has ´iz´ as its ending it means ´we´ and therefore should be ´biz öðrenciyiz´ ´we are students´

here are other endings

ben öðrenciyim

sen öðrencisin

o öðrenci

biz öðrenciyiz

siz öðrencisiniz

onlar öðrenci(lar)

The personal pronouns ben,sen,o etc are not necessary as the ending of the word shows the person I,you,she/he etc.

The personal endings stand in place of the verb ´to be´

Is "ben" necessary here?

I am assuming it is to show that oðrencýyým means "I am a student" and not "my student" - doðru mý?

Yes,thanks-I had modified my post as you were posting! But congrats on your 5000th post!!

Ben wouldn´t be necessary. When you want to say "my student", it would be (benim) öðrencim - the ending would be "m" as öðrenci ends with a vowel. When you want to say "I am" you´d use the ending "im" (or ým, um, üm - depending on vowel harmony) and since öðrenci ends with the vowel, you´d have to insert "y" in between the word and the ending - which is what you did - so it is apparent that öðrenciyim means "I am a student" and ben is not necessary.