词有：say, think, believe, agree, expect, consider, feel, know, decide, report, suggest, prove 等。

e.g. It is said that prices will rise again this month.

据说本月物价还将上涨。

It is thought that about a million dogs are born each year.

据认为每年约有一百条狗出生。

It is reported that all the passengers died in the crash.

据报导所有乘客在那次飞机坠毁中遇难。

It is agreed that we will have two weeks holiday this year.

2. 用于通告标题广告等的被动态往往省去助动词be。

e.g. No Chinese spoken here.

Shoes repaired.

Famous Painting Stolen. 名画被盗。

第二部分：练习：

1._____ a new library _____ in our school last year?

A. Is; built B. Was; built C. Does; build D. Did; build

2.An accident ____ on this road last week.

A. has been happened B. was happened C. is happened D. happened

3.Cotton ____ in the southeast of China.

A. is grown B. are grown C. grows D. grow

4.So far, the moon ____ by man already.

A. is visited B. will be visited C. has been visited D. was visited

5.A talk on Chinese history _____ in the school hall next week.

A. is given B. has been given C. will be given D. gives

6.A lot of things ____ by people to save the little girl now.

A. are doing B. are being done C. has been done D. will be done

7.The doctor _____ for yet.

A. isn't sent B. hasn't been sent C. won't be sent D. wasn't sent

8.--When ___ this kind of computers______? --Last year.

A. did; use B. was; used C. is; used D. are; used