To make the simple present tense into a negative sentence in Turkish, eg ‘i do not go’, add the following endings onto the verb;
-mem - i don’t....
-mezsin - you don’t...(singular/familiar)
-mez - he/she/it doesn’t...
-meyiz - we don’t...
-mezsiniz - you don’t...(plural/polite)
-mezler - they don’t....
(change the vowels in the suffix according to vowel harmony, eg ‘-mam‘, '-mayız', 'mazlar')
Asking questions in the negative simple present tense
To ask a question in this tense, add '-mez/maz' after the verb and then add the question marker with the personal ending.
examples
gelmez miyim? - do i not come?
kalmaz mısn? - do you (singular/familiar) not stay?
gitmez mi? - does he not go?
kalmaz mıyz? - do we not stay?
gelmez misiniz? - do you (plural/polite) not come?
okumazlar mı? - do they not read? *
* (as always with questions, the third personal plural is different and the question marker is always at the end of the sentence, after the suffix)