помогите, пожалуйста. нужно исправить ошибки, если они есть.

1. My sister has just return from Canada.
2. Alex had practise the text before he read it.
3. Cecilia will have persuade her mother by that time.
4. Mr. Slade has shovelled the leaves yesterday.
5. They had toured Austria under they went to Germany.
6. Mrs. Ashley will has informed the relatives by next May.
7. Their hamster has already eat the grains.
8. Aunt Mary had joined the Liberal Party before she went to Israel.
9. The boys will have win the game by next Monday.