Вставьте глаголы в Past Perfect в отрицательной форме.

1. I had not had breakfast before I went to school. 2. He had not met his friends after he had done his homework. 3. By 8 o'clock the rain had not stopped. 4. Alice was late because she had not missed the bus. 5. She had not gone to the post-office after she had written the letter.