Negative necessity relatives (-maması gereken)

Expressing "The Thing I Must Not Do"

To express a negative necessity in a relative clause—such as "the supplement that I must not take"—build directly on the structure from the previous lesson.

Add the negative suffix (-ma / -me), the verbal noun suffix (-ma / -me), and a possessive ending to the verb stem. Finally, follow it with gereken and the noun being described.

SubjectVerb StemSuffixesPhraseMeaning
Benal--ma-ma-malmamam gereken takviyethe supplement that I must not take
Seniç--me-me-niçmemen gereken sıvıthe fluid that you must not drink
O / Atletkullan--ma-ma-sıatletin kullanmaması gereken hormonthe hormone the athlete must not use
Biztüket--me-me-miztüketmememiz gereken besinthe nutrient that we must not consume
There are banned supplements and nutrients that I must not take.
Almamam gereken yasaklı takviyeler ve besinler var.
We talked about the liquid supplements you must not drink during the competition.
Müsabaka boyunca içmemen gereken sıvı takviyeler hakkında konuştuk.

Strict Dietary Restrictions

This structure is highly useful for discussing strict rules, such as the dietary restrictions, banned (yasaklı) substances, and doping regulations that professional athletes face before a competition (müsabaka).

That banned hormone that he must not use before the competition is doping.
Müsabakadan önce kullanmaması gereken o yasaklı hormon dopingdir.

Notice that even when referring to a plural subject like atletler (athletes), the third-person singular possessive suffix (-sı / -si) is generally used on the verbal noun rather than the plural form.

There are athletes who must not take more than five grams of creatine a day.
Günde beş gramdan fazla kreatin almaması gereken atletler var.
This nutrient is a creatine supplement that athletes must not consume too much.
Bu besin, atletlerin fazla tüketmemesi gereken bir kreatin takviyesidir.

You can pair this negative necessity relative clause with conditional statements (-sa / -se) or precise measurements to talk about exact limits.

If he is going to participate in the competition, there are creatine supplements that he must not take more than ten grams of.
Müsabakaya katılacaksa, on gramdan fazla almaması gereken kreatin takviyeleri var.
If this fluid contained hormones, it is a doping substance that he absolutely must not drink.
Eğer bu sıvı hormon içerdiyse, kesinlikle içmemesi gereken bir doping maddesidir.