Students must be clean their classroom every day 如何变为被动语态

Students must be clean their classroom every day 如何变为被动语态 the speech must be wonderful.the students ___(clap)their hands again The speech must be wonderful.The students ____ (clap)their hands again. must be what must be must be! (1/2)We must ask Tom to clean his room again Tom _ _ _ to cle Look!They must be students and always（）their school uniformsA wear B put on C dress D be in students usually go to school by boat. That must be a lot more fun than taking a bus的翻译 操场上肯定有学生在打篮球,是不是The playground there must be some students plying basketball,----- -------? The teacher told Tom not to be l_____ for school next time.Students must obey the school r_____. Please come in!Don't stand ( ) Ipod is my favorite music ( )Students must be ( )in the school library _____the exercise-books_____(must return)to the students tomorrow?请分析完整正确。be returned，为什么用这个？ Students must( )certain rules.Anyone who( )them will be punished.A.obey,breaksB.follow,breakC.be follow,breakD.be obeyed,break Miss Li requested that her students on time to every class.A.has to be B.were C.must be D.be为什么 不可以选择C 情态动词被动语态的划线部分提问Students must be given （proper homework）.我填的是 what must students be given? 但老师给的答案是 what must be given to students? 这不是改变了原意吗、求解! must be happy must be young must be beautiful Necessary action must be taken to make sure that students can feel and be safe at school请问这句话是什么意思? Look!They must be students and always（）their school uniforms.A wear B put on C dress D be in