分析例句英语语法

The boy needs very much the pen bought by his mother.

请帮我分析上句中“the pen bought”处
the pen与bought的关系在英语上是什麼语法？

thank you

the pen bought处实际上是一个省略形式，完整的形式应该是the pen which is bought by his mother.这里省略的是被动语态，the pen与bought在语法上的关系是动宾关系，bought是买buy的过去分词，buy是动词，pen是buy的对象，使宾语，动作的发生者是his mother

双宾语：he showed me a new picture. i bought my mother a bunch of flowers. 复合宾语：i think it necessary to learn english.

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