The man found the boy ____ by his parents.

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The man found the boy ____ by his parents.
A.abandoning
B.abandoned
C.having abandoned
D.to be abandoned

选择b,过去分词做后置定语,修饰the boy,表示这个男人发现了被父母抛弃的男孩.
下面是过去分词做后置定语的用法,希望对你有用
过去分词作定语有前置和后置两种情况.
1、前置定语
单个的过去分词作定语,通常放在被修饰的名词之前,表示被动和完成意义.
A类:被动意义:
an honored guest 一位受尊敬的客人
The injured workers are now being taken good care of in the hospital.
受伤的工人现正在医院受到良好的照料.
B类:完成意义:
a retired teacher 一位退休的教师
They are cleaning the fallen leaves in the yard.
他们正在打扫院子里的落叶.
2、后置定语
过去分词短语作定语时,通常放在被修饰的名词之后,它的作用相当于一个定语从句.如:
This will be the best novel of its kind ever written (=that has ever been written).
这将是这类小说中写得最好的.
Who were the so-called guests invited (=who had been invited) to your party last night?
昨晚被邀请参加你的晚会的那些所谓的客人是谁呀?
过去分词作表语
作表语的过去分词主要来自及物动词,在主-系-表句型中,说明主语所处的一种状态.其中系动词有包括be在内的多种形式.如:
You seem frightened.
你看样子受了惊吓.
少数不及物动词(如go,come,set)的过去分词也能作表语,但它们不表示被动意义,只是表示动作完成.如:
They are gone for vacation.
他们度假去了.
注意:要区别“系动词+过去分词(系表结构)” 和 “系动词+过去分词(被动语态)”.如:
A.The library is now closed.
图书馆现在关门了.
B.The library is closed at six.
图书馆经常在六点钟关门.
说明:作表语用的过去分词表示主语的特点或所处的状态,强调主谓关系.这种结构中的过去分词前可加quite,very,rather等修饰词.系动词可有多种,表示不同的意义;被动语态表示动作,强调动宾关系,绝大多数被动结构中的行为执行者还可以用by短语来表示.因此,我们不难看出在上面两句中,A句是系表结构,B句是被动语态.

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