2、；C、在定语从句中担当一个成分。例如： HarryPotteristheboywhohasmagicpower. 该句中，whohasmagicpower 是定语从句，修饰先行词theboy， “who”是引导定语从句的关系词，代替先行词theboy，在定语从句中作主语。（二）关系代词引导的定语从句1．who 指人，在定语从句中作主语。The boys who are playing football are from Class One. 正在踢足球的男孩是一班的。Those who want to go to the mus
3、eum must be at the school gate at 7 tomorrow morning. 想去博物馆的人必须在明晨7点到大门口集合。2．whom 指人，在定语从句中做宾语，常可省略。 Mr Liu is the person ( whom ) you talked about on the bus. 刘先生就是你们在公共汽车上谈论的那个人。The girl ( whom ) the teacher often praises is our monitor. 老师经常表扬的那个女孩是我们的班长。 注意
4、：关系代词whom 在口语或非正式文体中常可用who 来代替，也可省略。 The man ( whom / who )you met just now is my old friend.3．Which 指物，在定语从句中做主语或宾语，做宾语时常可省略。The factory which makes computers is far away from here. 制造计算机的那家公司离这儿很远。This is the pen ( which ) he bought yesterday. 这是他昨天买的钢笔。4．That 指
5、人时，相当于who 或whom；指物时，相当于which。在定语从句中作主语或宾语，作宾语时常可省略。The number of people that / who come to visit this city each year reaches one million. 每年来参观这座城市的人数达一百万。The person that /whom you introduced to me is very kind. 你介绍给我的那个人很友好。Yesterday I received a letter that / which
6、came from Australia. 昨天我收到了一封来自澳大利亚的信。5．Whose 通常指人，也可指物，在定语从句中做定语。He has a friend whose father is a doctor. 他有一个爸爸当医生的朋友。I once lived in the house whose roof has fallen in. 我曾经住在那幢屋顶已经倒塌了的房子里。注意：指物时，常用下列结构来代替：The classroom whose door is broken will soon be repaired.
7、The classroom the door of which is broken will soon be repaired. 6.关系代词总结主语宾语（that可省略）定语指人WhoThatWhom（优先）WhoThatWhose（ofwhom）指物WhichThatWhichThatWhose（ofwhich）指人和物ThatThatWhose（三）“介词+关系代词”引导的定语从句关系代词在定语从句中作介词宾语时，从句常常由“介词+关系代词”引出。The school (which / that) he once studied i
8、n is very famous.The school in which he once studied is very famous. 他曾经就读过的学校很出名。Tomorrow I’ll
