1. 如果主句的谓语动词是要求接双宾语的动词而且直接宾语是宾语从句，只要把间接宾语作为被动句的主语，把主动句中主句的谓语动词改为被动语态就可以了，原来的宾语从句不变。不能把原来的宾语从句作为被动句的主语。例如：

主动句：They showed us that David could do the repair .

被动句：We were showed that David could do the repair .

（摘自章振邦：《新编高级英语语法》p.150）

主动句：They informed the police that a traffic accident had happened in the street.

被动句：The police were informed that a traffic accident had happened in the street. （同上）

【注】其它及物动词的宾语从句也不能作被动句的主语。例如：

主动句：We felt that he was the right man for the job. 我们觉得他是做这项工作的合适人选。（但

不能说：That he was the right man for the job was felt.）（摘自《牛津英语用法指南》第

四版63.1）

被动句：It was felt that he was the right man for the job.人们觉得，他是做这项工作的合适人选。

（同上）

主动句：The newspapers say that his company is in trouble. 报纸上说他的公司陷入了困境。（但

不能说：That his company is in trouble is said.）（同上）

被动句：It is said that his company is in trouble. 据说，他的公司陷入了困境。（同上）

2. 如果主动句中主句的谓语动词是表示 “估计、认为、相信” 等意义的动词如 assume , believe , expect , fear , feel , know , presume (以为；假定), report , say , think , understand 等，可以有两种不同的被动句形式：

【被动句句型1】 It + be + 过去分词 + 主动句中的宾语从句（不做任何改动）。 

【说明】此句型中的It是形式主语， be 是系动词， 过去分词是表语，“主动句中的宾语从句”是真正主语，过去分词是主动句中主句的谓语动词的过去分词。如果主动句中主句的谓语动词是现在时，被动句中的 be用 is ； 如果主动句中主句的谓语动词是过去时，被动句中的 be用 was 。例如：

      They say that he is a genious.

    = It is said that he is a genious.

    = He is said to be a genious.

传闻他是个天才。（摘自《英汉多功能词典》新编升级版p.1489）

  They say that she was a popular singer.

= It is said that she was a popular singer.

= She is said to have been a popular singer.

据说她是位受欢迎的歌手。（摘自《英汉多功能词典》新编升级版p.1489）

They say that he is like a saint.

= It is said that he is like a saint.

= He is said to be like a saint.

据说他像圣人似的。（有菩萨心肠）（摘自《英汉多功能词典》新编升级版p.1489）

People say that she she looked after the orphan.

= It is said that she she looked after the orphan.

= She is said to have looked after the orphan.

听说是她照料那孤儿的。（摘自《英汉多功能词典》新编升级版p.1489）

【被动句句型2】主语 + be + 过去分词 + 带 to的动词不定式 + 主动句中宾语从句谓语动词后的内容  

【注意】此句型的主语就是主动句中宾语从句的主语，过去分词是主动句中主句谓语动词的过

去分词，动词不定式是主动句中宾语从句的谓语动词的不定式，该动词不定式短语在被动句中作主语补足语。如果主动句中的谓语动词是现在时，被动句中的be用is ； 如果主动句中的谓语动词是过去时，被动句中的be用 was。  

要特别注意被动句中“带 to的动词不定式”的用法：

A. 如果主动句中宾语从句的谓语动词是现在时，变为被动句后，“带 to的动词不定式”要用一般式，即“ to + 动词原形”。例如：

主动句：They think that he drives well.  人们认为他开车开得很好。

被动句：He is thought to drive well . 人们认为他开车开得很好。

B. 如果主动句中宾语从句的谓语动词是一般将来时、将来进行时或者现在进行时，变为被动句后，“带 to的动词不定式”要用动词不定式的进行时，即“ to be + 动词-ing形式”；但是，如果主动句中主句的谓语动词是 expect , 即使宾语从句的谓语动词是将来时，改为被动句后，“带 to的动词不定式”也要用一般式，即“ to + 动词原形”，不用进行时。例如：

主动句：We think that she will come.  我们相信她会来。

（ will come 是 come 的一般将来时）

主动句：We think that she will be coming.  我们相信她会来。

（ will be coming 是 come 的将来进行时）

主动句：We think that she is coming.  我们相信她会来。

（ is coming是 come 的现在进行时）

被动句：She is thought to be coing. 我们相信她会来。

主动句：We believe that she is working hard. （is working 是 work 的现在进行时）

被动句：She is believed to be working hard.  

我们相信她在努力工作。

主动句：It is expected that the President will speak today.

被动句：The President is expected to speak today.（不能说：... to be speaking ...）

预料总统今天发表演说。

主动句：It is expected that you will leave immediately .

被动句：You are expected to leave immediately . （不能说：... to be leaving ...）

期望你立即离开。

C. 如果主动句中宾语从句的谓语动词是一般过去时、现在完成时或者过去完成时，变为被动句后，“带 to的动词不定式”要用动词不定式的完成时，即 “to have + 过去分词”。例如：

主动句：I believe that they came. (came 是 come 的一般过去时)

主动句：I believe that they have come. (have come 是come 的现在完成时)

被动句：They are believed to have come. (to have come 是come 的动词不定式完成时)

我以为他们已经来了。

主动句：They said that she had finished the work ahead of schedule.

        被动句：She was said to have finished the work ahead of schedule.

据说她已提前完成了工作。

D. 如果主动句中宾语从句的谓语动词是过去进行时，变为被动句后，“带 to的动词不定式”要用完成进行时，即 “to have + been +动词的-ing 形式”。例如：

主动句：It is reported that he was driving carelessly. （was driving 是 drive 的过去进行时）

被动句：He is reported to have been driving carelessly. （ to have been driving 是 drive的

不定式的完成时）

        据报道他当时开车不小心。

【其它例句】

主动句：People believe that she is honest. 大家相信她是诚实的。

被动句：It’s believed that she is honest. 大家相信她是诚实的。

被动句：She is believed to be honest. 大家相信她是诚实的。

【补充说明】笔者在撰写撰写此文时，参考了赵俊英老师编写《现代英语语法》一书，并且选用了书中的一些例句。在此对赵老师表示衷心的感谢！