一句话的句子结构不是很清楚。
hough,Scientists are doing research on her.They want to see how civilized she
can become.Already she can do many things a human being does.
就是最后一句
Already she can do many things a human being does.
主语 she 谓语 can do 宾语 many thing
后面的是做什么成分？a human being does.
参考答案:Already she can do many things (that) a human being does.
定语从句省略that
(that) a human being does.修饰many things
作整个句子的补语
作many things的后置定语。