Помогите поставить предложения в past perfect tense

1. She had baked a lot before she opened the shop.2. We had a lot of troubles because we had lost our passports.3. Fred knew many people at the club because he had been there many times before.4. They had studied English before they moved to Canada.5. I had done my homework by the evening.6. Chris had owned that car for 5 years before he sold it.7. Sharon had been very sick until she stopped eating junk food.8. He had saved a lot of money before he bought a house.9. When I arrived at the cinema the film had started.10. He had not used email before, so I showed him how to use it.