一般疑问被动语态.请问Did the boys throw the volleyball on the playgruond?怎么改的啊?

一般疑问被动语态.请问Did the boys throw the volleyball on the playgruond?怎么改的啊? 一般疑问句怎么变被动语态Did say anything interesting? Who invited him to the party?被动语态Who did he ask for help?被动语态 Did you write the letter?变被动语态是什么? When did they invent the plane?改为被动语态. what did they invient the machine 的被动语态 When did he invent the telephone?变被动语态 How did you make the model plane 改为被动语态 How did you make the model piane 改为被动语态 How often did they watch the football 改为被动语态 When did he clean the window?怎样改为被动语态 把Did you water the tree?改为被动语态 Did he clean the blackboard just now?的被动语态 英语被动语态：Did Li Lei repair the door yesterday. Did your sister write the story?(改为被动语态) 改写为被动语态肯定、被动语态否定和被动语态疑问We plant trees every year.2、I sweep the floor at 7:00every day. They have painted the door already.(改为被动语态)When did they build他和house?（改为被动语态） 一般过去式中的被动语态