帮我看看这句英文对不对.定语从句

题目

帮我看看这句英文对不对.定语从句
There's a few people to whom the dictionary is useful.
二楼说的对，people虽是集合名词但表复数概念，谓语动词应该为复数。
但我觉得to放在前面和后面都可以，比如
Mr Jones,for whom I was working ,was very generous about overtime payments.
Mr Johnes,whom I was working for,was very generous about overtime payments.
另外to whom 在定语从句中作什么成分？

答案

There are a few people to whom the dictionary is useful.或者There are a few people the dictionary is useful to.to whom 在定语从句中是状语成分.一般情况下类似于to这样的介词可以放在定语从句中,也可以放在...