ІВ The sentences below are in the simple past. Rewrite them in the past perfect tense.

6.I tried to study for my science test, but I forgot my textbook at school.

7.Michael wanted to have a snowball fight, but the snow melted.

8.My dad made a blueberry pie, since he picked blueberries yesterday.

9.Yan couldn’t go to the birthday party anymore, but she bought a present.

10.When I got home, the dog fell asleep.​