改被动语态：we must do everything possible to keep environment clean.

what shall we do 改被动语态 改被动语态：we must do everything possible to keep environment clean. we must keep our classroom clean改被动语态 We must do something to help her被动语态 We must do homework every day被动语态 改为被动语态：We must do the work right now 一些英语句子怎样改被动语态1.Who helps you?2.Who does you help?3.Do you like your mother?4.We must learn English well. 改被动语态.1.we must take Peter to hospotal at once. someone must take care of the children when we go out.改被动语态 主动改被动语态 习题 someone must take careof the children when we go out wo must do sth to protcet the tigers改被动语态如题 we must do something to improve our english改为被动语态 we must do it as soon as possible改写为被动语态 John has finished his homework .we must do something to protect the environment.被动语态 （What shall we do next ）被动语态怎么改?—— we do it 改为为被动语态 Someone must hear her singing the song.改被动语态. We must finish our work on time 被动语态