Turkish alphabet consists of 29 letters - 8 vowels and 21 consonants.
Each letter has exactly one associated sound which never changes.

Three letters of the English alphabet are missing in the Turkish alphabet.

1. (Q-q)
2. (W-w)
3. (X-x)

There are seven additional characters not found in the English alphabet.

1. (Ç-ç)
   
2.  (Ğ-ğ) 
3.  (I-ı)
4. (İ-i)
5. (Ö-ö)
6. (Ş-ş)
7. (Ü-ü)
    
   

The letters of Turkish alphabet and the sounds associated with these are in the following table...