1. Его спрашивают на каждом уроке.

2. Мне уже показали фотографии.

3. Правила изменились год назад.

4. Мы закончили работу перед тем как позвонили.

6. Работа будет закончена к завтрашнем утру.

5. Они получат письмо завтра.

1. He is asked for each lesson

2. I have already shown the photos.

3. The rules have changed a year ago.

4. We finished before the bell rang.

5. They will receive a letter tomorrow.

6. The work will be finished by tomorrow morning.

1. He is asked at every lesson.

2. I have already been shown the photos.

3. The rules were changed a year ago.

4. We had finished work before ... (как позвонили - слово не пропущено?).

6. The work will have been finished by tomorrow morning.

5. They will receive the letter tomorrow.