过去完成时改被动语态We had cleaned our classroom by Tuesday .要怎么改成被动语态

过去完成时改被动语态We had cleaned our classroom by Tuesday .要怎么改成被动语态 we must keep our classroom clean改被动语态 改为被动语态March 311.把下列主动语态改成被动语态.1) We clean our classroom ever Who cleaned the classroom?改为被动语态 特殊疑问句改成被动语态怎么改? 改被动语态:Who cleaned the room? I cleaned the floor改被动语态 过去完成时的被动语态过去完成时的主动语态是：bad+过去分词被动语态怎么改啊 被动语态讲解We always keep the classroom clean.改成被动语态? 句型转换Who cleaned the classroom(改被动语态）Who________the classroom We are not allowed to smoke here、被动语态,可以改成主动语态么?怎么改. 初中英语变为被动语态we must keep our classroom clean