英语语法问题-句子改错In the recent years employers who have been taking more interest in recruitment.为什么who是多余的,这里为什么不能用who看出来了这是个简单句，不需要用who，是不是
问题描述：
英语语法问题-句子改错
In the recent years employers who have been taking more interest in recruitment.
为什么who是多余的,这里为什么不能用who
看出来了这是个简单句，不需要用who，是不是
答
In the recent years employers （who） have been taking more interest in recruitment.
时间状语 主 (主重复） 谓 宾
答
加了who之后就成了who引导定于从句修饰employers了，然后句子就没有谓语和宾语成分了。
In the recent years employers（ who have been taking more interest in recruitment）.
答
确实是多余的,因为如果用who,who have been taking more interest in recruitment是完整的句子,在句子中当定语,修饰前面的employers,变成employers who have been taking more interest in recruitment,这样,整个句子没有谓语.去掉who,have been taking.才是句子的谓语.