来自刘世龙的问题
【句型转换：1、Wecleanourclassroomtwiceaday.(改为被动语态）Ourclassroom________twiceaday.2、Theteachergavemeabook.(改为被动语态)I_______abookbytheteacher.3、IsthesongsungbySunNan(改为主动语】
句型转换：1、Wecleanourclassroomtwiceaday.(改为被动语态）
Ourclassroom________twiceaday.
2、Theteachergavemeabook.(改为被动语态)
I_______abookbytheteacher.
3、IsthesongsungbySunNan(改为主动语态）
____SunNan____thesong
4、Thebossmadetheworkerswork12hoursaday.(改为被动语态）
Theworkers________________12hoursadaybytheboss.
