改情态动词被动语态的句子

问题描述:

改情态动词被动语态的句子
1.We must clean our classroom every day
2.He can not find his MP3 anywhere
3.The workers can print these books in two days

our classromm must be cleaned by us every day.
his mp3 can not be found by him anywhere
htese books can be printed by the workers in two days