сделать предложения отрицательными
1.She can play chess.
2. He can play hockey.
3. They may go to the cinema.
4. I may open the window.
5. Children and adults must clean their teeth twice a day. (How often…?)
6. Children must go to school. (Where…?)
7. English learners must learn English words every day. (What…?)
8. You should keep your room tidy. (What…?) (keep tidy — держать в порядке)
9. Children should listen to their parent`s advice.
10. They should be polite.