Ответ:

1. always

2. now

3. already

4. since he came back from school

5. at 10 a.m. yesterday

6. for 2 hours when his father came home

7. before the rain started

8. last month

9. next weekend

10. by 6 pm tomorrow

11. at 5pm tomorrow

Объяснение:

если не ошибаюсь, то так