Negative verb stem (verb-me/ma-), auxiliary consonant y (it is used to establish a connection between two vowels), the suffixes -ecek or -acak (according to the vowel harmony) and the personal ending are added to the verb stem. The "k" in the suffixes become a "ğ" before the 1st personal endings:
Verb stem + appropriate form of me– + buffer letter –y + appropriate form of ecek + personal ending
This is a bit complicated. Look at the examples, notice that personal endings for 3rd person plural come before the interrogative particle "mı/mi", while other personal endings come after "mı/mi". Also "mi" changes according to the vowel harmony although it is written as a separate word. If 1st personal ending come after mı/mi, -y- consonant should be added to make a connection between two vowels.
Verb stem (+ appropriate form of me–) + appropriate form of ecek question particle mi + personal ending (personal ending comes before the interrogative particle in 3rd person plural)