mustn't
uk/ˈmʌs.ənt/us/ˈmʌs.ənt/short formofmust not:
（must not的缩略形式）You mustn'tworrytoo much about this.你不必对此太担心。
- You mustn't go into thegarden.
- Tell them they mustn't make too muchnoise.
- You mustn'tleavelitterlyingaround.
- I mustn'tforgetmykeys.
- She mustn'tfeelshe has topay.