clean the classroom是怎么意思?

clean the classroom是怎么意思? clean the classroom,pleass.的意思是什么? clean the classroom 保持-------the classroom clean. ______ clean the classroom. I clean the classroom today 怎么改为被动语态 sarah can clean the classroom怎么改否定句 who ____(clean) the classroom? i must____(clean) the classroom. let is clean the classroom? the students clean the classroom every day The student____(clean)the classroom every day