Помогите с английским языком!!
put the verbs in brackets into the correct tense

10. What were you doing . . .11 had been teaching 12. have you been doing. . . 13 have read 14. have you seen 15. I shall be sleeping. . . 16. Have you found. . . I'm still looking for it. I have already been looking for it for two hours but I haven't found it yet. 17. have been sailing. . . 18. have been waiting 19. had been writing would finish 20. found. . had got up and were waiting for him.