He could not account for out of where he made such a large sum of money 其中where从句是什么成分

题目

He could not account for out of where he made such a large sum of money 其中where从句是什么成分

答案

where从句是宾语从句,作account for 的宾语.其中out of 提前了.正常的语序为:
He could not account for where he made such a large sum of money out of .
out of 应与where紧密相连,因此提前为:out of where 出自什么地方(即出处,来源)
句意:他不能解释这么大一笔钱的来源./他说不清这么大一笔钱的来源.