Помогите пожалуйста! Нужно сказать следующие предложения в прошедшем времени!…

Помогите пожалуйста! Нужно сказать следующие предложения в прошедшем времени! Образец: He has a car He had a car He will have a car.1. They have a big house in the country.2. My friend has many interesting books.3. His mother has a nice garden.4. She has a good dog.5. These students have five examinations.6. I have a beautiful picture.