这句话怎么改为被动语态?I want to do it again.I want it to be done again可以吗

把这句话改为被动语态..I couldn't find my maths book anywhere last night.改为被动语态. 这句话怎么改为被动语态?I want to do it again.I want it to be done again可以吗 I don't want you to help me with my math 改为被动语态 i don't want you to help me with my maths 改为被动语态! 怎么改为被动语态? Do people use knives to cut things ? 这句话改为被动语态Do people use knives to cut things ? 这句话改为被动语态怎么改? I've hidden those trees for almost a week.把这句话改为被动语态 I can take a book 改为被动语态怎么改 I clean the classroom today 怎么改为被动语态 They have all been put to shame by a boy这句话说是被动语态,改为主动语态怎么改, 一道关于被动语态的题目、Jack's father allowed him to make his own decisions.这句话怎么改为被动语态. l didn't buy the book,这句话怎么改被动语态? I watered fiowers yesterday 改为被动语态 I can play baseball 改为被动语态 I saw him dancing.改为被动语态 英语的被动语态不是:be动词+过去分词吗?那下面这句话怎么是被动语态呢?I hear the song sung by Jolin? 第5题怎么改为被动语态 这一题怎么改为被动语态谢谢!