have they discussed the question?变被动语态?

have they discussed the question?变被动语态? 英语被动语态被动语态练题一、 将下列句子变为被动语态1.We discussed the question at the They must have lost your letter in the post 怎么变被动语态 "Where do they sell the cars?"变被动语态 They are picking the apples 变被动语态 have to 变被动语态 People have solved the problem?变被动语态 Have you posted the letters yet?变被动语态 They have painted the door already.(改为被动语态) They have sold out the white sports shoes 被动语态 They have already sold out the computers.(被动语态) Have they paid you the money?被动语态是什么?