mayn't

例句：

1. 1. You mayn't go out tonight if it rains.
   如果下雨，今晚你可能不能出去。
2. 2. He mightn't be able to finish the project on time.
   他可能无法按时完成这个项目。
3. 3. She mayn't have enough money for a new car.
   她可能没有足够的钱买一辆新车。