这个句子的被动语态：we must keep the classroom clean 谢

这个句子的被动语态：we must keep the classroom clean 谢 初中英语变为被动语态we must keep our classroom clean we must keep our classroom clean改被动语态 we must keep the classroom clean的句子基本结构 被动语态讲解We always keep the classroom clean.改成被动语态? We must ___(keep) the classroom clean. 把We must keep the room clean.变成另一种语态的句子 We must keep the air in the room clean.(改为被动语态） we clean the classroom in the afternoom 改为被动语态 we should clean the classroom everyday改为被动语态 We clean the classroom every day.改为被动语态 We must keep our classroom clean and tidy句子结构