Задание № 4. Преобразуйте предложения в отрицательные:
13. Your uncle is a teacher.
14. The sisters were famous dancers.
15. She will go to bed at 11 o’clock.
16. My mother prepared dinner yesterday.

13) Your uncle not is a teacher.

13. Your uncle is not a teacher.14. Your sister weren't famous dancers.15. She won't go to bed at 11 o'clock.16. My mother didn't prepare dinner yesterday.