为什么不能用accidents be caused by.只能用accidents caused by.

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为什么不能用accidents be caused by.只能用accidents caused by.
为什么不能用accidents be caused by.只能用accidents caused by.

为什么不能用accidents be caused by.只能用accidents caused by.
被动啊,
accidents caused by和accidents are caused by都有
但是有区别
accidents are caused by+sth.,比如by the unawareness of drivers
但是
accidents caused by sth.+句子
e.g.
accidents caused by careless drivers are very serious

因为
过去分词作后置定语,现在分词,介词短语做后置定语,都是 有 定语从句 变化而来。
定语从句 省略掉 关系代词+be 动词 得到的,必须一起省略。缺一不可,
accidents( that/which are )caused by```
所以 第一种显然是错误的。
再给你几个例子:
people (who/that are) on the s...

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因为
过去分词作后置定语,现在分词,介词短语做后置定语,都是 有 定语从句 变化而来。
定语从句 省略掉 关系代词+be 动词 得到的,必须一起省略。缺一不可,
accidents( that/which are )caused by```
所以 第一种显然是错误的。
再给你几个例子:
people (who/that are) on the street are very nice..

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用过去分词做定语时,表示已经被做,不需要加be。如:a house built last year,去年建的一所房子。
如果是正在被做,用being加过去分词,如:a bridge being built,一座正在施工的桥梁。
如果是将要被做,要用to be 加过去分词,如:a school to be built next year,一所明年要建设的学校。...

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用过去分词做定语时,表示已经被做,不需要加be。如:a house built last year,去年建的一所房子。
如果是正在被做,用being加过去分词,如:a bridge being built,一座正在施工的桥梁。
如果是将要被做,要用to be 加过去分词,如:a school to be built next year,一所明年要建设的学校。

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