Помогите пожалуйста сделать английский язык ( юриспруденция)

Укажите способ образования отрицания.

1. Certain contracts are not enforceable unless they are in writing and are signed by the parties.

2. If one of the parties has failed to perform its obligations, the other party to the contract may file a claim to the court

3. A citizen of the RF not younger than 35 may be elected President of the RF but not more than for two terms in succession.

4. As neither the procurator nor the defendant made any appeals to a higher court, the sentence came into force.

5. They never seek assistance irrespective of conditions.

6. She failed to protect the child though it was her duty to do it.

7. Parents' rights to custody of their children may be limited because of failure to provide adequate care.

8. Legislative enactments and international agreements may not be applied if they violate the Constitution.

9. It is not the voting that is democracy, it is counting.

10. The position of the British prime minister is based on convention, not statute.

11. An attorney in America must first get a license to practice; if he fails to obey such a rule then his actions are qualified as unauthorized practice of law.