"I am coming from school."
● -(y)(n)e,a >>> to.
● -(n)da,de >>> in, on, at.
● -(n)den,dan,ten,tan >>> from.
[Y]: it takes a buffer -y- when added (e, a) directly as the first suffix to a root word which ends in a vowel.
[ n ]: It takes buffer letter -n- when added as a second suffix to an already extended noun.
To learn more about Suffixes in Turkish: http://www.turkishlanguage.co.uk/suffix.htm