Ç, ç - 'ch' as in 'church' and 'chatter'
Ğ, ğ - This letter is soundless. It's purpose is to elongate the nearest preceding vowel letter.
Ö, ö same as in German, or like British 'ur', as in 'turn'
Ş, ş - 'sh' as in 'show' and 'should'
Ü,ü- as in German müsli or u in French tu or like 'cube'