both of them both them both of their parents both their parents 的区别?

题目

both of them both them both of their parents both their parents 的区别?

答案

both of them=they both,在句中作主语用
them both：在句中作宾语（因为them为宾格）
both of their parents= both their parents 在句中既可做主语,也可以做宾语,只要是有需要名词就可以用.