Ответ:

Affirmative:

  1. Susan ’s new to the school.
  2. I ’m 14 years old.
  3. They ’re in Room E.
  4. He ’s my best friend.
  5. You ’re in Grade 7.

Negative:

  1. Susan isn’t new to the school.
  2. I ’m not 14 years old.
  3. They aren’t in Room E.
  4. He isn’t my best friend.
  5. You aren’t in Grade 7.