Did Lily buy her sister a chat?变被动语态怎么变?

Did Lily buy her sister a chat?变被动语态怎么变? Did Lily buy her sister a hat?改为被动语态 请帮我把下列句子翻为被动语态,在线等 6. Did Lily buy her sister a h 被动语态变主动语态怎么变 Did a car knock him down yesterday?变被动语态 主动语态怎么变被动语态 did her mother buy her a new cd player?改为被动语态 主动语态变被动语态怎么变啊? 主动语态变被动语态 1. They promised Mary a new doll for her birthday 变被动语态 一般疑问句怎么变被动语态 这个句子怎么变被动语态?