汉译英（主要是如何判断主动语态和被动语态的）

1. He is not allowed to somke in the library.
2.High school students are not permitted to have part-time work.
3.主动：The principal doesn't allow us to make noise outside the classroom.
被动：We aren't allowed to make noise outside the classroom by our principal.
4.High school students are not allowed to chat online.

1.He is not allowed to smoke in the reading room.
2.Middle school students are not allowed to find part-time jods.
3.The headmaster doesn't allow us make noise outside the classroom.
4.Middle school students are not allowed to chat on the Internet.

He is not allowed to smoke in the reading room
Middle school students are not allowed to get part-time job
The headmaster doesn't allow us to make a noise outside the classroom
Middle school students are not allowed to chat on the Intenet