Turkce'de her harfin bir sesi vardir. Kelimeler yazildigi gibi okunur.
Bununla beraber, agiz tembelliginden olsa gerek, "gelecegim" can be shortened as "gelcem" while speaking. If you use the long version (gelecegim) while speaking, it is also correct. But short version (gelcem) is more common while talking. However while writing, you always write the proper version which is the long version.