Make the sentences negative and interrogative.
1) A little girl has painted a funny picture.
2) We have visited this town.
3) The kettle has boiled.
4) They have understood the task.
5) Ben has broken his leg.
6) My mother has got a postcard from her friend.
7) We have had breakfast.

В отрицательных предложениях в Present Perfect ставим not после have/has:
have not / has not + V3 или кратко haven’t / hasn’t + V3.

В вопросах have/has ставим перед подлежащим:
Have/Has + subject + V3?

1. A little girl has painted a funny picture.
   Negative: A little girl has not painted a funny picture. / A little girl hasn’t painted a funny picture.
   Interrogative: Has a little girl painted a funny picture?

2. We have visited this town.
   Negative: We have not visited this town. / We haven’t visited this town.
   Interrogative: Have we visited this town?

3. The kettle has boiled.
   Negative: The kettle has not boiled. / The kettle hasn’t boiled.
   Interrogative: Has the kettle boiled?

4. They have understood the task.
   Negative: They have not understood the task. / They haven’t understood the task.
   Interrogative: Have they understood the task?

5. Ben has broken his leg.
   Negative: Ben has not broken his leg. / Ben hasn’t broken his leg.
   Interrogative: Has Ben broken his leg?

6. My mother has got a postcard from her friend.
   Negative: My mother has not got a postcard from her friend. / My mother hasn’t got a postcard from her friend.
   Interrogative: Has my mother got a postcard from her friend?

7. We have had breakfast.
   Negative: We have not had breakfast. / We haven’t had breakfast.
   Interrogative: Have we had breakfast?