affirmative and negative помогите англ​

1. The pictures were found in an old house.
2. The first prize was won by Naomi and Simon.
3. The art thief wasn't caught by the police.
4. The portraits were not sold yesterday.
5. That big sculpture was taken on Friday.
6. These masterpieces were painted by Pablo Picasso.
7. The exhibition was opened by a famous artist.