1。主语不确定

　　Someone murdered the millionaire last night.The millionaire was murderedlast night。

　　2. 主语是泛指很多人或者大部分人

　　To improve the air quality, we should reduce the use of private cars. To improve the air quality, the use of private cars should be reduced。

　　Most people think that we can get a large share of benefit in the sales campaign.It is widely believed that we can get a large share of benefit in the sale campaign。

　　被动句的用法不仅体现在主句中，在从句、非谓语动词短语中都有可能用到，如：

　　It is important for nations all over the world to join hands to control the software piracy. It is important for nations all over the world to join hands to have the software piracy controlled。

　　I dont expect that she returned. She is not expected to have returned。

　　I am not sure whether the college graduates will find jobs in the financially difficult year. I am not sure whether the college graduates will get employed in the financiallydifficult year。

　　但是因为汉语中本来是没有被动句式的，所以受汉化思维的影响很多考生不会想到这一点。这就要求我们对此要引起足够的重视，并且在平时多加练习以培养对其敏感度。

　　三 名词化

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