You must be a teacher,____ ____

You must listen to the teache carefully.改为祈使句____ _____ the teacher carefully,please. i think you must be a teacher是什么意思must be为什么不是must are?must you must be a very c___ man You must be a teacher,____ ____ you must always be a------ in practice You must be strong . you must be You must be hungry You must be joking You must be confident. You must be dreaming you must be careful 将you must be a good student改为祈使句 after a long work ,you must be t（ ） As a teacher,you must be _k___about your subject. You by my side.Must be a gift from heaven You must be a member to upload photos. 用所给动词的适当形式填空：（ ）you ( )(be) here this Saturday?No.I ( )(visit) my teache