Questions & Answers about Kuralları ihlal etmek yasak.
Because it’s the direct object of the verb phrase ihlâl etmek (to violate). In Turkish, a definite direct object takes the accusative. Here, kuralları means “the rules.”
- Morphology: kural (rule) + -lar (plural) + -ı (accusative) = kuralları.
- The whole subject of the sentence is the infinitive phrase Kuralları ihlal etmek (“to violate the rules”), within which the object still behaves like a normal object and gets accusative marking when definite.
Surface-form ambiguity exists. Kuralları can be:
- Accusative plural: “the rules” (as here).
- 3rd person possessive plural: “his/her rules.” You tell from context. If it meant “his/her rules,” you’d often see the possessor stated: onun kuralları. Also, if you put that possessed noun in the accusative, it becomes kurallarını.
Turkish uses a copular suffix instead of a separate “to be” verb, and in the simple present with third person it can be omitted. So:
- Kuralları ihlal etmek yasak. = “To violate the rules is forbidden.”
- You can also include the copula for formality/emphasis: yasaktır.