СРОЧНО! ПОЖАЛУЙСТА, семестровая оценка зависит этой работы! помогите

1. Would come
2. Saw
3. Would arrive
4. Had come
5. Were
6. Would stop
7. Had been
8. Was singing
9. Was
10. Was working
11. Comes
12. Would have finished
13. Had
14. Would send
15. Had not seen