помогите не понимаю большое спасибо тем кто поможет )

1. When the police arrived, we had already catch the thief.
2. Jack had finished the test before the bell rang.
3. When Anna came to say good-night, her children had already fallen asleep.
4. Scott had already prepared the dinner when her husband got home from work.
5. When Brad and Susan got married, they had known each other for 3 years.
6. She didn't enjoy the film because she had read the book before.