пять предложений с отрицанием в Past Perfect

Вот пять предложений с отрицанием в Past Perfect:

1. She hadn’t finished her homework before the teacher arrived.
2. They hadn’t seen that movie until last weekend.
3. He hadn’t spoken to her since last summer.
4. We hadn’t realized the mistake until after the meeting.
5. I hadn’t visited that museum before my trip to the city.