一般现在：
I am named as monitor of my class.
The pencil is broken by Tom.
Japan is suffered from disaster.
一般过去：
Japan was hit by earthquake last Monday.
He was named as monitor of my class last week.
China was regared as richest country in the world in ancient time.
现在完成：
The work has been finished.
The homework has been done.
The situation has been turned to be normal.
过去完成：
The city had been polluted in 1990.
The company had been sold last year.
Tom had been examed in his first year of high school.
一般进行时：
The road is being renewed.
The situation is being turned.
The country is being reformed.
过去进行时：
The bridge was being rebuilt the last time I came here.
Tom was being requested when I saw him.
Leaflets were being sent at the begining of the meeting.