Замените в следующих предложениях действительный залог страдательным. Используйте конструкцию с предлогом by.

1. Two different teachers have marked the exams. 2. A police car is following that green van. 3. He will deliver the new model in ten days. 4. Your son has already broken my window three times.

1. The exams have been marked by two different teachers.

2. That green van is being followed by a police car.

3. The new model will be delivered by him in ten days.

4. My window has already been broken three times by your son.