They must have lost your letter in the post 怎么变被动语态

They must have lost your letter in the post 怎么变被动语态 they must have lost your letter in the post. the letter _ _(must post) at once 被动语态 You letter must have been lost by them in the post. 的汉语是什么? You must hand in your homework after class.变被动语态怎么变 have they discussed the question?变被动语态? 把We must sell allthese goods.they must have lost your letter 主动语态变被动语态:They must build another house to live in they found the lost boy 20 rninutes ago变被动语态 Have they posted the letter yet?改为被动语态如题 We must choose some books for your brother怎么变被动语态? Tony put your letter in the schoolbag just now.改为被动语态