Пять предложений в Past Perfect

Вот пять предложений в Past Perfect:

1. She had already finished her homework before her friends arrived.
2. By the time we got to the theater, the movie had started.
3. They had never seen such a beautiful sunset until that day.
4. He realized that he had left his wallet at home after he reached the store.
5. The team had practiced hard, so they were ready for the match.