Перепишите следующее предложение, как в примере:

Example: We live in the city which was founded more than 1,500 years ago. - We live in the city founded more than 1,500 years ago.
Пример: Мы живем в городе, который был основан более 1500 лет назад. - Мы живем в городе, основанным более 1500 лет назад.


The common law which is not based on the principle of deciding cases by reference to written statutes

Суть ты понял, просто убираем which

The general law is not based on the principle of cases citing legislation ( отрицание)The general law based on the principle of cases citing legislation ( утверждение )