1. When I got to school, Mary hadn't arrived yet.
2. By the time your phoned, I had finished my homework.
3. By the time I left for school, my desk mate hadn't written his essay.
4. I phoned my sister after I had bought the tickets for the movie.
5. When I arrived at the cinema, she hadn't got there yet.
6. By the time mother finished cooking, my father had laid the table.
7. When I entered the classroom, all the windows had been opened.
8. By the time I found out the results, my mother had told me about my excellent marks.
9. We went home after my brother had helped our sister to wash up.
