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被动语态的用法
（1）当不知道或没有必要指出谁是动作的执行者 时
It’s said / reported / + that …据说/据报道
It’s reported that it will rain tomorrow.
据报道，明天会下雨。
（2）强调动作的承受者，这时应用by短语。
The cup was broken by David.
（3）作客观说明时，常采用一种被动语态句型.
1.一般现在时的被动语态结构：
is/are+过去分词
Cars are made in China .
The desk is made of wood.
English is taught in our school.
如何由主动语态变成被动语态呢 ？
by many students.
1.Many students study English.
English
is studied
2.They make shoes in that factory.
Shoes
are made
by them
in that factory.
1.一般现在时的被动语态结构：
is/are+过去分词
1.将主动语态的宾语变为被动语态的主语。
2. 将主动语态的谓语动词由主动变为被动
3. 将主动语态的主语变为被动语态中介词by
的宾语放在谓动词之后
运用一下吧