begin是否有被动?一般不是都说the class begins,the movie begins吗?为什么这句The research is so designed that once begun nothing can be done to change it.却用了被动?

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begin是否有被动?一般不是都说the class begins,the movie begins吗?为什么这句The research is so designed that once begun nothing can be done to change it.却用了被动?
begin是否有被动?
一般不是都说the class begins,the movie begins吗?
为什么这句The research is so designed that once begun nothing can be done to change it.
却用了被动?

begin是否有被动?一般不是都说the class begins,the movie begins吗?为什么这句The research is so designed that once begun nothing can be done to change it.却用了被动?
1.begin的确有被动.
2.
1）begin既可以作不及物动词,如：the class begins和the movie begins等.
2）但是它也可以做及物动词,用法类似于start,后面可以直接加宾语.
如：I began my class with a humorous story.
变成被动即为：My class was begun with a joke (by me).
3）不过用做不及物动词时居多,上句的确也可以写成：
My class began with a humorous story.
3.楼主所给的例题即是begin做及物动词.
该句采用了状语从句的省略语法,即：
Once begun nothing can be done to change it.
=Once (it is begun) nothing can be done to change it.
如果此题begin为不及物动词,则没法采用该语法,因为状语从句省略时,要求从句的谓语动词必须以be动词开头.

实义动词都是有被动语态的，还没学到是吗？？
仔细分析，句子中的“research”与“begin”是被动的关系

有被动啊
这个调查设计得很好，以至于它已被启动，我们就不用做什么来改变了
省略了it was

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