在某人的帮助下,是with the help of his 还是with the help of him

问题描述:

在某人的帮助下,是with the help of his 还是with the help of him

with the help of him.
在某人的帮助下,with the help of sb.
这里的of后加的是名词,
所以用代词宾格代替一个名词,
而不用代词所有格,
不同于a friend of sb's,用a friend of his