my father enjoys the books_by akasha为什么答案是written?要省略was?为什么这句又不省keys_used for opening the door?

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my father enjoys the books_by akasha为什么答案是written?要省略was?为什么这句又不省keys_used for opening the door?
my father enjoys the books_by akasha为什么答案是written?要省略was?为什么这句又不省keys_used for opening the door?

my father enjoys the books_by akasha为什么答案是written?要省略was?为什么这句又不省keys_used for opening the door?
my father enjoys the books written by Akasha.
written是过去分词做后置定语,修饰books.
句子也可以写为
my father enjoys the books （which/that were) written by Akasha.括号里的可以省略,因为（which/that were) written by Akasha 是定语从句,起修饰作用,而不是一个单独的主句.
而 keys are used for opening the door.钥匙是用来开门的.这是一个独立的句子,如果省略了be动词（are）的话,句子就不对了.
被动语态 be used for
举个例子
This key is used for opening my room.is不能省略
I lost the key (which/ that is) used for opening my room.括号的能省略.
缘由如上.

答案是 written 。
这是用过去分词作定语。
因为句子已经有了谓语动词 enjoys ，所以不能加 was 。
keys【are 】used for opening the door.
本句是被动语态。are used 作谓语，所以be 动词不能省略。

祝你开心。

你好:
这里考的是 : 过去分词做后置定语的用法,而不是被动语态的用法, 意思是"akasha写的..." ,修饰 the books.

第二句中, be used for doing sth 意思是"被用作做....." 这里的was 不能省略, 因为, 省略了was , 句子就没有谓语动词了, 句子结构就...

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你好:
这里考的是 : 过去分词做后置定语的用法,而不是被动语态的用法, 意思是"akasha写的..." ,修饰 the books.

第二句中, be used for doing sth 意思是"被用作做....." 这里的was 不能省略, 因为, 省略了was , 句子就没有谓语动词了, 句子结构就不完整了.

希望对您有帮助!

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全句：my father enjoys the books (which was)written by akasha. 句子中已经有了动词enjoy, 后面的written 用来说明books 的。定语从句了，可以省略which was。你说的后面那个句子不能省去was， be use for 说明钥匙是用来开门滴。

过去分词作后置定语，其实是省略了WHICH WAS的定语从句，即
my father enjoys the books(which was written ) by akasha
而Keys (are ) used for opening the door.是被动语态（是简单句）
加油！不明白再问！如果帮到你，请采纳，谢谢！什么是过去分词作后置定语。。。因为句子的成分已...

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过去分词作后置定语，其实是省略了WHICH WAS的定语从句，即
my father enjoys the books(which was written ) by akasha
而Keys (are ) used for opening the door.是被动语态（是简单句）
加油！不明白再问！如果帮到你，请采纳，谢谢！

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一、
这句句子其实省略了that was

My father enjoys the books （that/which was written） by akasha.

(1) (that/which was written by akasha)这个短语是对books进行修饰的。

(2) 省略that/whic...

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一、
这句句子其实省略了that was

My father enjoys the books （that/which was written） by akasha.

(1) (that/which was written by akasha)这个短语是对books进行修饰的。

(2) 省略that/which was ,由written by akasha直接修饰books
现在完成时直接修饰名词

二、
be used for 是一个固定词组，意思是被用来。

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第一句是后置定语从句，可以省略
第二句没有谓语，缺的词就是作为谓语存在怎么能省略呢。

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