Ответ:

  1. Gleb doesn’t wear expensive clothes.
  2. He doesn’t tell lies to his friends.
  3. They don’t judge people by their appearance.
  4. Vera doesn’t know his true personality.
  5. Polina doesn’t read an interesting book.

В отрицании Present Simple используется don’t или doesn’t; после них глагол стоит в начальной форме.