The classroom is being cleaned.谁能帮我分析一下这句话的结构

the backboard is()()()()the classroom let is clean the classroom? is in the classroom翻译 one the students is in the classroom the library is (next to the classroom) There is a blackboard( )( )( )the classroom There is a blackboard( )( )( )the classroom The classroom is clean 的反义词是什么? 改错:Is there anybody in the classroom? Everyone is in the classroom,---------- ---------- 反义疑问句? My classroom is on the third floor The picture () our classroom is good My classroom is on the ground floor. The teacher is in___ ___ ___the classroom Is this the key___the classroom?填什么? Bill is in the classroom,doing( )homework our classroom is () the secoud floor My classroom is on the second f____