I once lived in the housewhoseroof has fallen in.我曾经住在那幢屋顶已经倒塌了的房
子里。
三、“介词+关系代词”引导的定语句
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 studiedinis very famous.
The personthat /whomyou introduced to me is very kind.你介绍给我的那个人很友好。
The seasonthat / whichcomes after spring is summer.春天以后的季节是夏季。
Yesterday I received a letterthat / whichcame from Australia.昨天我收到了一封来自澳
This is the boy (whom / who / that) I played tenniswithyesterday.
大利亚的信。
5．whose通常指人，也可指物，在定语从句中做定语。
I visited a scientistwhosename is known all over the country.我拜访了一个全国知名的科
学家。
He has a friendwhosefather is a doctor.他有一个爸爸当医生的朋友。
This is the pen( which )he bought yesterday.这是他昨天买的钢笔。
The film( which )they went to see last night was not interesting at all.他们昨晚看的电影一点意思也没有。
4．that指人时，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。
教案7.21
定语从句详细讲解
一、定义及相关术语
1．定语从句：修饰某一名词或代词的从句叫定语从句。定语从句一般紧跟在它所修饰的先行词之后。
2．先行词：被定语从句修饰的词叫先行词。
3．关系词：引导定语从句的词叫关系词。
关系词有关系代词和关系副词。关系代词有that, which, who, whom, whose, as等；关系副词有when, where, why等。关系词通常有下列三个作用：
=The schoolin whichhe once studied is very famous.他曾经就读过的学校很出名。
Tomorrow I’ll bring here the magazine (which / that) you askedfor.
=Tomorrow I’ll bring here the magazineforwhichyou asked.明天我将把你要的杂志带来。
注意：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，在定语从句中作主语或宾语，作宾语时常可省略。
Football is a gamewhichis liked by most boys.足球是大多数男孩所喜欢的运动。
A.引导定语从句；B.代替先行词；C.在定语从句中担当一个成分。
The manwho is shaking hands with my fatheris a policeman.
该句中，who is shaking hands with my father是定语从句，修饰先行词the man，“who”是引导定语从句的关系词，代替先行词the man，在定语从句中作主语。
Li Ming is just the boy (whom) I want to see.明正是我想要见的男孩。
The professor (whom) you are waiting for has come.你正在等的教授已经来了。
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。
The factorywhichmakes computers is far away from here.制造计算机的那家公司离这儿很远。
He likes to read bookswhichare written by foreign writers.他喜欢外国作家写的书。
The housewhichis by the lake looks nice.湖边的那幢房子看上去很漂亮。
Yesterday I helped an old manwhohad lost his way.昨天我帮助了一位迷路的老人。
That is the teacherwhoteaches us physics.那就是教我们物理的老师。
2．whom指人，在定语从句中作宾语，常可省略。
Mr Liu is the person (whom) you talked about on the bus.先生就是你们在公共汽车上谈论的那个人。
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 boyswhoare playing football are from Class One.正在踢足球的男孩是一班的。
Thosewhowant to go to the museum 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。
The number of peoplethat / whocome 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。
Where is the manthat / whomI saw this morning?我今天早上看到的那个人在哪儿？