被动语态怎么改?

问题描述:

被动语态怎么改?

Billy often says he doesn't need any help.

You can not use this kind of dress by hand.

When did the builders set up the teaching building?

这三句怎么改被动语态

Billy often says he doesn't need any help.it's often said by billy that he doesn't need any help.You can not use this kind of dress by hand.This kind of dress can't be used by hand.When did the builde...