Измените предложения в прошедшее абсолютное время:1. My friend has prepared the

Измените предложения в прошедшее абсолютное время:

1. My friend has prepared the report (by last Monday).

2. The students have done the exercises (by the end of the lesson).

3. Mother has cooked supper (by the time I came home).

4. We have not seen our teacher (before the bell rang).

5. Have you done the work (before I called you up)?

6. He has translated the article (by this time yesterday).

7. She has not bought a present for him (when we came to her place).