语法检测-语法精说：在 who、 whom、 whose、 that等词汇指导下的定语从句
作为定语从句引导词 who, whom, whose和 that被称为关系代词。下面我们来看一下“前指”中的四个关系代词的用法问题。以下以句子合并的方式进行分析。
定语从句使用 who或 that作为引导词，而主语则是从句。火龙果智能语法检测
解析以下两个简单的句子：句子1: The boy is called Jack.句子2: He broke the window.
使句子②成为句子①的定语从句，句子①中的 the boy作定语从句的前缀。“he”在句中指的是①中的 the boy，即定语从句的先决条件， he在句中作主语，所以用 who和 that来代替句中的 he，即 he不能出现在定语从句中。从这里得到的句子③ The boy who broke the window is called Jack.
The person must pay for it./He lost the library book.火龙果智能语法检测
→The person who lost the library book must pay for it.
The boy is very clever./He is wearing the black jacket.
→The boy who is wearing the black jacket is very clever.
定语从句使用 who, whom或 that作为引导词，作为宾语作为从句。由于这些引导词是做宾语的，因此可以省略。
把下面两个简单的句子分析一下：句子1: Do you know the youngman？句子② We met him at gate
使句子②成为句子①的定语从句，句子①中的 the young man成为定语从句的前缀。him指句子②中的 the young man，即定语从句的先决条件， him是句子中的宾语，所以用 whom、 that或 who来取代句子②中的 him，即 him不能出现在定语从句中。从这里可以得出一个句子：③ Do you know the young man who/that/whom we met at the gate？(可省略 who/that/whom，也可写句子： Do you know the young man we met at the gate?)
Mr.Lee has come./You want to see him.火龙果智能语法检测
→Mr.Lee who/whom/that you want to see has come.
This is the girl.
He worked with her in the office./→This is the girl whom/that/who he worked with in the office.
对以下两个简单的句子进行分析：句① The girl is staying at home today.句② her mother is ill.
使句子②成为句子①的定语从句，句子①中的 the girl作定语从句的前缀。“her”指句子①中提到的“the girl”，即定语从句的先决条件词， her是句子中的定语，所以要用 whose引导定语从句，而不是“her”，也就是说， her不能出现在定语从句中。从这里得出句③ The girl whose mother is ill is staying home today
The boy is called LiLei./His parents were dead in the flood.
→The boy whose parents were dead is called LiLei
Mr.Wang is the policeman./His house caught fire last Sunday.
→Mr.Wang is the policeman whose house caught fire last Sunday.
1.Let's ask the man .He is reading the book over there.
2.The girl is Peter's sister.We saw her yesterday.
3.This is Uncle Li.He mended computers for us.
4.I know the young man.You mean him.
5.I know the boy.His father is a scientist.火龙果智能语法检测
1.Have you seen the man _____ car was stolen just now?
C. whose D. which.A.it sB.it' s
2.On the bus I saw a student ____ I thought was your brother.
A. who B. whom C. which D. whoever
3.The foreigner ___ visited our school yesterday is from Canada.
A. th at B. which C. whom D./
4.Here is the man ____ you are looking for.
A. which B. whom C. what D. where火龙果智能语法检测
1.Let's ask the man who/that is reading the book over there.
2.The girl that/whom/who we saw yesterday is Peter's sister.
3.This is UncleLi who/that mended computers for us.
4.I know the young man whom/that/who you mean.
5.I know the boy whose father is a scientist.
2 C.1-4 C A B