如何使用被动语态

学习被动语态时，不仅要知道被动语态的各种语法结构，还要知道在哪些情况中使用被动语态。

⒈ 讲话者不知道动作的执行者或不必说出动作的执行者（这时可省by短语）。

如：My bike was stolen last night.

⒉ 借助被动的动作突出动作的执行者。

如：I was given ten minutes to decide whether I should accept the offer.

⒊ 为了更好地安排句子。

例：The wellknown person got on the bus and was immediately recognzed by people.（一个主语就够了）

It is said that从句及其他类似句型

一些表示"据说"或"相信"的动词如 believe,consider,expect,report,say,suppose,think等可以用于句型"It+be+过去分词+that从句"或"主语+be+过去分词+to do sth."的有：

It is said that 据说

It is reported that 据报道

It is believed that 大家相信

It is hoped that 大家希望

It is well I known that 众所周知

It is thought that 大家认为

It is suggested that 据建议

如：It is said that the boy has passed the national exam.(=The boy is said to have passed the national exam.

谓语动词的主动形式表示被动意义

⒈ 英语中有很多动词如 break,catch,clean,drive,lock,open,sell,read,write,wash等，当它们被用作不及物动词来描述主语特征时，常用其主动形式表达被动意义，主语通常是物。

如：This kind of cloth washes well.

注意：主动语态表被动强调的是主语的特征，而被动语态则强调外界作用造成的影响。

试比较：The door won't lock.（指门本身有毛病）

The door won't be locked.(指不会有人来锁门，指"门没有锁"是人的原因）

⒉ 表示"发生、进行"的不及物动词和短语，如：happen,last,take place,break out,come out,come about,come true,run out,give out,turn out等以主动形式表示被动意义。

如：How do the newspapers come out?这些报纸是如何引出来的呢？

⒊ 系动词没有被动形式，但有些表示感受、感官的连系动词feel,sound,taste,book,feel等