Объяснение:

N. 1

1:has worked.

2:has suffered.

3:have already known

4:have had

5:has been, has been.

N. 2(если ошибаюсь прости, задание непонял)

1:Has she been to England twice.

2:Dr. grant hasn't phoned her this evening.

3:Has the president left for London today.

4:She hasn't just returned.

5:Have the Herrigtons bought a new car.

6:You haven't passed your examination.

N. 3

1:the best

2:the happiest

3:the saddest

4:the nicest

5:the longest