Mustn't Needn't‎ > ‎


  1. Jack gave me a letter to post. I mustn't forget to post it.
  2. "Do you want me to wait?" "No, It's okay. You  needn't wait."
  3. This ring is very valuable. You mustn't lose it.
  4. You needn't come if you don't want to.
  5. We still have enough eggs. We needn't buy any.