The child has been brought up by his mother分析句子成分。

这句话是被动语态的表达结构。翻译成这个小孩被他的母亲抚养长大。
The child 是句子的主语
has been brought up 是谓语动词，brought up 是短语动词 bring up的过去分词。has been brought up 是现在完成时的被动结构，翻译成汉语是：被抚养长大的意思。
by his mother 是动作的执行者，表示 bring up 的动作有谁发出。

主谓状结构.