1. All pupils are supplied with textbooks.
interrogative: Who is supplied with textbooks?
negative: All pupils aren't supplied with textbooks.
2. America was discovered by Columbus.
interrogative: What was discovered by Columbus?
negative: America wasn't discovered by Columbus.
3. The floor was painted last summer.
interrogative: What was painted last summer?
negative: The floor wasn't painted last summer.
4. The shop will be closed at 8 o'clock.
interrogative: What will be closed at 8 o'clock?
negative: The shop won't be closed at 8 o'clock.
5. The sick man is being operated on.
interrogative: Who is being operated on?
negative: The sick man is being operated on.
6. The room is being cleaned now.
interrogative: What is being cleaned now?
negative: The room isn't being cleaned now.
7. This metro line was being built at that time.
interrogative: What was being built at that time?
negative: This metro line wasn't being built at that time.
8. This novel has been translated into Russian.
interrogative: What has been translated into Russian?
negative: This novel hasn't been translated into Russian.
9. A new business center has been built in our town.
interrogative: What has been built in our town?
negative: A new business center hasn't been built in our town.
10. The tickets had been sold out by that time.
interrogative: What had been sold out by that time?
negative: The tickets hadn't been sold out by that time.