The first two are correct; the third is wrong.

Interested in Language
Is it correct if someone says: " . . I was a student of Mr. x some years ago " . .
or, should it be " . . . I was Mr. X's student some years ago "
or, " Mr. X, I was his student . . . "
Last edited by Rover_KE; 20-Apr-2017 at 08:43.
The first two are correct; the third is wrong.
Thank you.
As Rover noted when he deleted your last post of thanks, Rezafo, separate posts of thanks are unnecessary. Simply click on Thank, as you did. If you post a separate 'thank you', it will appear in the list of new posts, and cause people to come to the thread expecting to read a follow-up question or additional comment.