who做定语从句的用法如下:
1、who指人,是主格,在定语从句中作主语,一般可用that替换;whom指人,是宾格,在定语从句中作宾语,在口语和非正式文体中可用who或that替换,也可以省略。
如:
The man who / that spoke to the headmaster just now is our physics teacher.
The woman (who / whom / that) we met at the school gate is Wei Fang’s mother.
2、who在定语从句中做关系代词 引导后面的限制性定语从句后面的定语从句为陈述句语序.
The man who is talking to the teacher is my father.与老师交谈的人是我父亲.这个句子中who 就是作主语的.
Dr Yuan Longping is a scientist who devotes all his life to super hybrid rice.袁隆平博士是个这样的科学家:他把毕生都献给优质杂交水稻.
在who devotes all his life to super hybrid rice这个定语从句中,who是行为动作的主体,即执行者,作主语.
The girl who I talked with is beautiful but rude.刚才我与她谈了话的那个女孩很美丽但很粗鲁.
在who I talked with这个定语从句中,who是行为动作的对象,即承受者,作宾语.