被动语态详解

如：

①据说…… It is said that–clause.        

②据报导…… It is reported that–clause.

③据推测…… It is supposed/assumed that–clause.       

④希望…… It is hoped that–clause.          

⑤众所周知…… It is known to all that–clause.       

⑥普遍认为…… It is thought/considered/believed that–clause.      

⑦有人建议…… It is suggested that–clause.

这些句子中出现了从句，所以可以简单地把句子变化成to do 结构，主要把从句主语放到句首作主语。

如：

(1) It is said that he knows Professor Zhang.

→ He is said to know Professor Zhang.

4. need 的词组表示被动 need to be done可以用need doing来表示。

如：

(1) This bike has broken, and it needs to be repaired.

→ This bike has broken, and it needs repairing.

三、不使用被动语态的情形：

1、系动词，不及物动词没有被动语态，如：rise, happen, succeed, remain, lie等。

如：

① When we got to the top of the mountain, the sun had already risen. 

② After the earthquake, few houses remained. 

2、一些不及物动词短语没有被动语态，如：take place, break out, belong to, lose heart, consist of, add up to等。如：

① Class begins at 7:30 every day．

3、主动形式表被动含义：

动词 (表示主语的属性特征) read, write, sell, wash, clean, wear, lock, open, cook, shut, dry, eat, drink, …+ 副词 (well/ badly/easily/smoothly),用主动式表示被动义。