we must study hard. we musn't waste our time.
we must follow the rules of the school. we mustn't break them.
we must listen to the teacher carefully.we mustn't talk with each other at class.
i must contribute myself to study.
i mustn't smoke in the classroom.
i must listen to the teacher carefully.
i mustn't talk with student in class.
i must take part in the acitivities at school.
i mustn't sleep in the classroom.
Must不一定是“必须”的意思！它的用法其实很多！
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024