when did your father buy you the mobile phone 换为被动语态 when（ ）

when did your father buy you the mobile phone 换为被动语态 when（ ） when was your mobile phone bought 改为主动语态 when the plane take off ,you（ ）use your mobile phone when did you do your homework?改为被动语态 when ____ your homework when did you buy this book变为被动语态 Aheavy basket full of apple 英语翻译Just put on the panel of your mobile phone,when you make You should turn off your mobile phone when the plane _______ when was your mobile phone bought(改为主动句） When did they invent the plane?改为被动语态. When did he invent the telephone?变被动语态 When did he clean the window?怎样改为被动语态 when did play 为什么是被动语态